77912923 has 4 divisors (see below), whose sum is σ = 84995928. Its totient is φ = 70829920.

The previous prime is 77912917. The next prime is 77912941. The reversal of 77912923 is 32921977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32921977 = 11 ⋅2992907.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77912923 is a prime.

It is a super-3 number, since 3×77912923³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77912903) 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, 3541486 + ... + 3541507.

It is an arithmetic number, because the mean of its divisors is an integer number (21248982).

Almost surely, 2^77912923 is an apocalyptic number.

77912923 is a deficient number, since it is larger than the sum of its proper divisors (7083005).

77912923 is a wasteful number, since it uses less digits than its factorization.

77912923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083004.

The product of its digits is 47628, while the sum is 40.

The square root of 77912923 is about 8826.8297253317. The cubic root of 77912923 is about 427.1068131122.

The spelling of 77912923 in words is "seventy-seven million, nine hundred twelve thousand, nine hundred twenty-three".