77967923 has 6 divisors (see below), whose sum is σ = 85700412. Its totient is φ = 70879820.

The previous prime is 77967913. The next prime is 77967941. The reversal of 77967923 is 32976977.

It is not a de Polignac number, because 77967923 - 2⁸ = 77967667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77967913) 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 5 ways as a sum of consecutive naturals, for example, 322061 + ... + 322302.

It is an arithmetic number, because the mean of its divisors is an integer number (14283402).

Almost surely, 2^77967923 is an apocalyptic number.

77967923 is a deficient number, since it is larger than the sum of its proper divisors (7732489).

77967923 is a wasteful number, since it uses less digits than its factorization.

77967923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644385 (or 644374 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 50.

The square root of 77967923 is about 8829.9446770634. The cubic root of 77967923 is about 427.2072900226.

The spelling of 77967923 in words is "seventy-seven million, nine hundred sixty-seven thousand, nine hundred twenty-three".