77116831 has 4 divisors (see below), whose sum is σ = 84127464. Its totient is φ = 70106200.

The previous prime is 77116807. The next prime is 77116841. The reversal of 77116831 is 13861177.

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 77116831 - 2⁷ = 77116703 is a prime.

It is a super-2 number, since 2×77116831² = 11894011246965122, 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 (77116841) 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, 3505300 + ... + 3505321.

It is an arithmetic number, because the mean of its divisors is an integer number (21031866).

Almost surely, 2^77116831 is an apocalyptic number.

77116831 is a deficient number, since it is larger than the sum of its proper divisors (7010633).

77116831 is a wasteful number, since it uses less digits than its factorization.

77116831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010632.

The product of its digits is 7056, while the sum is 34.

The square root of 77116831 is about 8781.6189281931. The cubic root of 77116831 is about 425.6471451221.

The spelling of 77116831 in words is "seventy-seven million, one hundred sixteen thousand, eight hundred thirty-one".