3931157697 has 8 divisors (see below), whose sum is σ = 5274929856. Its totient is φ = 2604078672.

The previous prime is 3931157689. The next prime is 3931157701. The reversal of 3931157697 is 7967511393.

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

It is not a de Polignac number, because 3931157697 - 2³ = 3931157689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3931157687) 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, 4172733 + ... + 4173674.

It is an arithmetic number, because the mean of its divisors is an integer number (659366232).

Almost surely, 2^3931157697 is an apocalyptic number.

It is an amenable number.

3931157697 is a deficient number, since it is larger than the sum of its proper divisors (1343772159).

3931157697 is a wasteful number, since it uses less digits than its factorization.

3931157697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346567.

The product of its digits is 1071630, while the sum is 51.

The square root of 3931157697 is about 62698.9449432764. The cubic root of 3931157697 is about 1578.2416074642.

The spelling of 3931157697 in words is "three billion, nine hundred thirty-one million, one hundred fifty-seven thousand, six hundred ninety-seven".