3131930857 has 4 divisors (see below), whose sum is σ = 3416651856. Its totient is φ = 2847209860.

The previous prime is 3131930849. The next prime is 3131930909. The reversal of 3131930857 is 7580391313.

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 3131930857 - 2³ = 3131930849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131930957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142360483 + ... + 142360504.

It is an arithmetic number, because the mean of its divisors is an integer number (854162964).

Almost surely, 2^3131930857 is an apocalyptic number.

It is an amenable number.

3131930857 is a deficient number, since it is larger than the sum of its proper divisors (284720999).

3131930857 is a wasteful number, since it uses less digits than its factorization.

3131930857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284720998.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 3131930857 is about 55963.6565728152. The cubic root of 3131930857 is about 1463.0889216291.

The spelling of 3131930857 in words is "three billion, one hundred thirty-one million, nine hundred thirty thousand, eight hundred fifty-seven".