23973665 has 4 divisors (see below), whose sum is σ = 28768404. Its totient is φ = 19178928.

The previous prime is 23973641. The next prime is 23973679. The reversal of 23973665 is 56637932.

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 12737761 + 11235904 = 3569^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 23973665 - 2⁶ = 23973601 is a prime.

It is a super-2 number, since 2×23973665² = 1149473227064450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397362 + ... + 2397371.

It is an arithmetic number, because the mean of its divisors is an integer number (7192101).

Almost surely, 2^23973665 is an apocalyptic number.

It is an amenable number.

23973665 is a deficient number, since it is larger than the sum of its proper divisors (4794739).

23973665 is an equidigital number, since it uses as much as digits as its factorization.

23973665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794738.

The product of its digits is 204120, while the sum is 41.

The square root of 23973665 is about 4896.2909431528. The cubic root of 23973665 is about 288.3443708859.

The spelling of 23973665 in words is "twenty-three million, nine hundred seventy-three thousand, six hundred sixty-five".