23959921 has 2 divisors, whose sum is σ = 23959922. Its totient is φ = 23959920.

The previous prime is 23959909. The next prime is 23959933. The reversal of 23959921 is 12995932.

It is a balanced prime because it is at equal distance from previous prime (23959909) and next prime (23959933).

It can be written as a sum of positive squares in only one way, i.e., 23902321 + 57600 = 4889^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 23959921 - 2⁵ = 23959889 is a prime.

It is not a weakly prime, because it can be changed into another prime (23959121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11979960 + 11979961.

It is an arithmetic number, because the mean of its divisors is an integer number (11979961).

Almost surely, 2^23959921 is an apocalyptic number.

It is an amenable number.

23959921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23959921 is an equidigital number, since it uses as much as digits as its factorization.

23959921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 40.

The square root of 23959921 is about 4894.8872305703. The cubic root of 23959921 is about 288.2892581528.

The spelling of 23959921 in words is "twenty-three million, nine hundred fifty-nine thousand, nine hundred twenty-one".