77316831 has 6 divisors (see below), whose sum is σ = 111679880. Its totient is φ = 51544548.

The previous prime is 77316803. The next prime is 77316851. The reversal of 77316831 is 13861377.

It is not a de Polignac number, because 77316831 - 2⁹ = 77316319 is a prime.

It is a super-2 number, since 2×77316831² = 11955784711765122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77316851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4295371 + ... + 4295388.

Almost surely, 2^77316831 is an apocalyptic number.

77316831 is a deficient number, since it is larger than the sum of its proper divisors (34363049).

77316831 is a wasteful number, since it uses less digits than its factorization.

77316831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8590765 (or 8590762 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 77316831 is about 8792.9989764585. The cubic root of 77316831 is about 426.0147948310.

The spelling of 77316831 in words is "seventy-seven million, three hundred sixteen thousand, eight hundred thirty-one".