23990081 has 4 divisors (see below), whose sum is σ = 25033152. Its totient is φ = 22947012.

The previous prime is 23990059. The next prime is 23990089. The reversal of 23990081 is 18009932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23990081 is a prime.

It is a super-2 number, since 2×23990081² = 1151047972773122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23990089) 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, 521501 + ... + 521546.

It is an arithmetic number, because the mean of its divisors is an integer number (6258288).

Almost surely, 2^23990081 is an apocalyptic number.

It is an amenable number.

23990081 is a deficient number, since it is larger than the sum of its proper divisors (1043071).

23990081 is a wasteful number, since it uses less digits than its factorization.

23990081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043070.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 23990081 is about 4897.9670272471. The cubic root of 23990081 is about 288.4101706039.

The spelling of 23990081 in words is "twenty-three million, nine hundred ninety thousand, eighty-one".