76981431 has 16 divisors (see below), whose sum is σ = 104566784. Its totient is φ = 50367744.

The previous prime is 76981427. The next prime is 76981453. The reversal of 76981431 is 13418967.

It is not a de Polignac number, because 76981431 - 2² = 76981427 is a prime.

It is a super-2 number, since 2×76981431² = 11852281437615522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76981431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76981031) 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, 35916 + ... + 37998.

It is an arithmetic number, because the mean of its divisors is an integer number (6535424).

Almost surely, 2^76981431 is an apocalyptic number.

76981431 is a deficient number, since it is larger than the sum of its proper divisors (27585353).

76981431 is a wasteful number, since it uses less digits than its factorization.

76981431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310.

The product of its digits is 36288, while the sum is 39.

The square root of 76981431 is about 8773.9062566225. The cubic root of 76981431 is about 425.3978852841.

The spelling of 76981431 in words is "seventy-six million, nine hundred eighty-one thousand, four hundred thirty-one".