3115797891 has 4 divisors (see below), whose sum is σ = 4154397192. Its totient is φ = 2077198592.

The previous prime is 3115797857. The next prime is 3115797907. The reversal of 3115797891 is 1987975113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3115797891 - 2¹¹ = 3115795843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3115757891) 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, 519299646 + ... + 519299651.

It is an arithmetic number, because the mean of its divisors is an integer number (1038599298).

Almost surely, 2^3115797891 is an apocalyptic number.

3115797891 is a deficient number, since it is larger than the sum of its proper divisors (1038599301).

3115797891 is a wasteful number, since it uses less digits than its factorization.

3115797891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038599300.

The product of its digits is 476280, while the sum is 51.

The square root of 3115797891 is about 55819.3325918539. The cubic root of 3115797891 is about 1460.5724112849.

The spelling of 3115797891 in words is "three billion, one hundred fifteen million, seven hundred ninety-seven thousand, eight hundred ninety-one".