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47070061 = 212922109
BaseRepresentation
bin1011001110001…
…1101101101101
310021120101222121
42303203231231
544022220221
64400512541
71111042333
oct263435555
9107511877
1047070061
112462a485
121391b751
1399a090c
146373b53
1541eba41
hex2ce3b6d

47070061 has 4 divisors (see below), whose sum is σ = 47094300. Its totient is φ = 47045824.

The previous prime is 47070007. The next prime is 47070071. The reversal of 47070061 is 16007074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16007074 = 28003537.

It can be written as a sum of positive squares in 2 ways, for example, as 8555625 + 38514436 = 2925^2 + 6206^2 .

It is a cyclic number.

It is not a de Polignac number, because 47070061 - 27 = 47069933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47070071) 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, 8926 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (11773575).

Almost surely, 247070061 is an apocalyptic number.

It is an amenable number.

47070061 is a deficient number, since it is larger than the sum of its proper divisors (24239).

47070061 is a wasteful number, since it uses less digits than its factorization.

47070061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24238.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 47070061 is about 6860.7624211891. The cubic root of 47070061 is about 361.0618366920.

The spelling of 47070061 in words is "forty-seven million, seventy thousand, sixty-one".

Divisors: 1 2129 22109 47070061