77923 has 4 divisors (see below), whose sum is σ = 80640. Its totient is φ = 75208.

The previous prime is 77899. The next prime is 77929. The reversal of 77923 is 32977.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77891 and 77900.

It is not an unprimeable number, because it can be changed into a prime (77929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2⁷⁷⁹²³ is an apocalyptic number.

77923 is a deficient number, since it is larger than the sum of its proper divisors (2717).

77923 is a wasteful number, since it uses less digits than its factorization.

77923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716.

The product of its digits is 2646, while the sum is 28.

The square root of 77923 is about 279.1469147241. The cubic root of 77923 is about 42.7125225846.

It can be divided in two parts, 77 and 923, that added together give a cube (1000 = 10³).

The spelling of 77923 in words is "seventy-seven thousand, nine hundred twenty-three".