27312923 has 4 divisors (see below), whose sum is σ = 29795928. Its totient is φ = 24829920.

The previous prime is 27312917. The next prime is 27312973. The reversal of 27312923 is 32921372.

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

It is a cyclic number.

It is not a de Polignac number, because 27312923 - 2⁸ = 27312667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27312913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241486 + ... + 1241507.

It is an arithmetic number, because the mean of its divisors is an integer number (7448982).

Almost surely, 2^27312923 is an apocalyptic number.

27312923 is a deficient number, since it is larger than the sum of its proper divisors (2483005).

27312923 is a wasteful number, since it uses less digits than its factorization.

27312923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483004.

The product of its digits is 4536, while the sum is 29.

The square root of 27312923 is about 5226.1767096033. The cubic root of 27312923 is about 301.1545252790.

The spelling of 27312923 in words is "twenty-seven million, three hundred twelve thousand, nine hundred twenty-three".