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3975403961 = 4784583063
BaseRepresentation
bin1110110011110011…
…1101100110111001
3101021001102110000202
43230330331212321
531120200411321
61454250411545
7200341243004
oct35474754671
911231373022
103975403961
111760014921
1292b430bb5
134b47bc349
14299d9053b
1518401770b
hexecf3d9b9

3975403961 has 4 divisors (see below), whose sum is σ = 4059987072. Its totient is φ = 3890820852.

The previous prime is 3975403933. The next prime is 3975403963. The reversal of 3975403961 is 1693045793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1693045793 = 1799590929.

It is a cyclic number.

It is not a de Polignac number, because 3975403961 - 218 = 3975141817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 84583063 = 3975403961 / (3 + 9 + 7 + 5 + 4 + 0 + 3 + 9 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3975403963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42291485 + ... + 42291578.

It is an arithmetic number, because the mean of its divisors is an integer number (1014996768).

Almost surely, 23975403961 is an apocalyptic number.

It is an amenable number.

3975403961 is a deficient number, since it is larger than the sum of its proper divisors (84583111).

3975403961 is an equidigital number, since it uses as much as digits as its factorization.

3975403961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84583110.

The product of its (nonzero) digits is 612360, while the sum is 47.

The square root of 3975403961 is about 63050.8046023205. The cubic root of 3975403961 is about 1584.1407120059.

The spelling of 3975403961 in words is "three billion, nine hundred seventy-five million, four hundred three thousand, nine hundred sixty-one".

Divisors: 1 47 84583063 3975403961