23997313 has 4 divisors (see below), whose sum is σ = 24017220. Its totient is φ = 23977408.

The previous prime is 23997299. The next prime is 23997343. The reversal of 23997313 is 31379932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21827584 + 2169729 = 4672^2 + 1473^2 .

It is a cyclic number.

It is not a de Polignac number, because 23997313 - 2⁹ = 23996801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23997343) 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, 8020 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (6004305).

Almost surely, 2^23997313 is an apocalyptic number.

It is an amenable number.

23997313 is a deficient number, since it is larger than the sum of its proper divisors (19907).

23997313 is a wasteful number, since it uses less digits than its factorization.

23997313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19906.

The product of its digits is 30618, while the sum is 37.

The square root of 23997313 is about 4898.7052371009. The cubic root of 23997313 is about 288.4391488692.

It can be divided in two parts, 23997 and 313, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 23997313 in words is "twenty-three million, nine hundred ninety-seven thousand, three hundred thirteen".