77937813 has 24 divisors (see below), whose sum is σ = 116663040. Its totient is φ = 50086080.

The previous prime is 77937803. The next prime is 77937841. The reversal of 77937813 is 31873977.

It is not a de Polignac number, because 77937813 - 2⁶ = 77937749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77937803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113770 + ... + 114452.

It is an arithmetic number, because the mean of its divisors is an integer number (4860960).

Almost surely, 2^77937813 is an apocalyptic number.

It is an amenable number.

77937813 is a deficient number, since it is larger than the sum of its proper divisors (38725227).

77937813 is a wasteful number, since it uses less digits than its factorization.

77937813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1126 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 77937813 is about 8828.2395187263. The cubic root of 77937813 is about 427.1522893368.

The spelling of 77937813 in words is "seventy-seven million, nine hundred thirty-seven thousand, eight hundred thirteen".