23985881 has 2 divisors, whose sum is σ = 23985882. Its totient is φ = 23985880.

The previous prime is 23985877. The next prime is 23985887. The reversal of 23985881 is 18858932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 8462281 = 3940^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 23985881 - 2² = 23985877 is a prime.

It is a super-2 number, since 2×23985881² = 1150644974692322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23985887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11992940 + 11992941.

It is an arithmetic number, because the mean of its divisors is an integer number (11992941).

Almost surely, 2^23985881 is an apocalyptic number.

It is an amenable number.

23985881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23985881 is an equidigital number, since it uses as much as digits as its factorization.

23985881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 44.

The square root of 23985881 is about 4897.5382591665. The cubic root of 23985881 is about 288.3933387389.

The spelling of 23985881 in words is "twenty-three million, nine hundred eighty-five thousand, eight hundred eighty-one".