23925981 has 4 divisors (see below), whose sum is σ = 31901312. Its totient is φ = 15950652.

The previous prime is 23925977. The next prime is 23925983. The reversal of 23925981 is 18952932.

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 not a de Polignac number, because 23925981 - 2² = 23925977 is a prime.

It is a super-2 number, since 2×23925981² = 1144905133624722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23925983) 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, 3987661 + ... + 3987666.

It is an arithmetic number, because the mean of its divisors is an integer number (7975328).

Almost surely, 2^23925981 is an apocalyptic number.

It is an amenable number.

23925981 is a deficient number, since it is larger than the sum of its proper divisors (7975331).

23925981 is an equidigital number, since it uses as much as digits as its factorization.

23925981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975330.

The product of its digits is 38880, while the sum is 39.

The square root of 23925981 is about 4891.4191192332. The cubic root of 23925981 is about 288.1530701537.

The spelling of 23925981 in words is "twenty-three million, nine hundred twenty-five thousand, nine hundred eighty-one".