23315977 has 4 divisors (see below), whose sum is σ = 23326996. Its totient is φ = 23304960.

The previous prime is 23315947. The next prime is 23315989. The reversal of 23315977 is 77951332.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12187081 + 11128896 = 3491^2 + 3336^2 .

It is a cyclic number.

It is not a de Polignac number, because 23315977 - 2⁷ = 23315849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23315917) 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, 1224 + ... + 6937.

It is an arithmetic number, because the mean of its divisors is an integer number (5831749).

It is a Poulet number, since it divides 2^23315976-1.

Almost surely, 2^23315977 is an apocalyptic number.

It is an amenable number.

23315977 is a deficient number, since it is larger than the sum of its proper divisors (11019).

23315977 is an equidigital number, since it uses as much as digits as its factorization.

23315977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11018.

The product of its digits is 39690, while the sum is 37.

The square root of 23315977 is about 4828.6620300038. The cubic root of 23315977 is about 285.6830931542.

The spelling of 23315977 in words is "twenty-three million, three hundred fifteen thousand, nine hundred seventy-seven".