1970399761 has 8 divisors (see below), whose sum is σ = 2149963200. Its totient is φ = 1790909040.

The previous prime is 1970399759. The next prime is 1970399777. The reversal of 1970399761 is 1679930791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1970399761 - 2¹ = 1970399759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1970399699 and 1970399708.

It is not an unprimeable number, because it can be changed into a prime (1970399701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49435 + ... + 79903.

It is an arithmetic number, because the mean of its divisors is an integer number (268745400).

Almost surely, 2^1970399761 is an apocalyptic number.

1970399761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1970399761 is a deficient number, since it is larger than the sum of its proper divisors (179563439).

1970399761 is a wasteful number, since it uses less digits than its factorization.

1970399761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36359.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 1970399761 is about 44389.1851806270. The cubic root of 1970399761 is about 1253.6744703768.

The spelling of 1970399761 in words is "one billion, nine hundred seventy million, three hundred ninety-nine thousand, seven hundred sixty-one".