76991131 has 16 divisors (see below), whose sum is σ = 89611200. Its totient is φ = 64788480.

The previous prime is 76991099. The next prime is 76991137. The reversal of 76991131 is 13119967.

It is a cyclic number.

It is not a de Polignac number, because 76991131 - 2⁵ = 76991099 is a prime.

It is a super-2 number, since 2×76991131² = 11855268505318322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (76991137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100791 + ... + 101551.

It is an arithmetic number, because the mean of its divisors is an integer number (5600700).

Almost surely, 2^76991131 is an apocalyptic number.

76991131 is a deficient number, since it is larger than the sum of its proper divisors (12620069).

76991131 is a wasteful number, since it uses less digits than its factorization.

76991131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its digits is 10206, while the sum is 37.

The square root of 76991131 is about 8774.4590146630. The cubic root of 76991131 is about 425.4157518706.

The spelling of 76991131 in words is "seventy-six million, nine hundred ninety-one thousand, one hundred thirty-one".