3959694957 has 4 divisors (see below), whose sum is σ = 5279593280. Its totient is φ = 2639796636.

The previous prime is 3959694953. The next prime is 3959694983. The reversal of 3959694957 is 7594969593.

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.

It is not a de Polignac number, because 3959694957 - 2² = 3959694953 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 (3959694953) 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, 659949157 + ... + 659949162.

It is an arithmetic number, because the mean of its divisors is an integer number (1319898320).

Almost surely, 2^3959694957 is an apocalyptic number.

It is an amenable number.

3959694957 is a deficient number, since it is larger than the sum of its proper divisors (1319898323).

3959694957 is a wasteful number, since it uses less digits than its factorization.

3959694957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319898322.

The product of its digits is 82668600, while the sum is 66.

The square root of 3959694957 is about 62926.1071177933. The cubic root of 3959694957 is about 1582.0513542422.

The spelling of 3959694957 in words is "three billion, nine hundred fifty-nine million, six hundred ninety-four thousand, nine hundred fifty-seven".