77960913 has 16 divisors (see below), whose sum is σ = 105830400. Its totient is φ = 51040080.

The previous prime is 77960899. The next prime is 77960923. The reversal of 77960913 is 31906977.

It is not a de Polignac number, because 77960913 - 2⁵ = 77960881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77960923) 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 15 ways as a sum of consecutive naturals, for example, 49228 + ... + 50786.

It is an arithmetic number, because the mean of its divisors is an integer number (6614400).

Almost surely, 2^77960913 is an apocalyptic number.

It is an amenable number.

77960913 is a deficient number, since it is larger than the sum of its proper divisors (27869487).

77960913 is a wasteful number, since it uses less digits than its factorization.

77960913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852.

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 77960913 is about 8829.5477234114. The cubic root of 77960913 is about 427.1944864117.

The spelling of 77960913 in words is "seventy-seven million, nine hundred sixty thousand, nine hundred thirteen".