23953921 has 2 divisors, whose sum is σ = 23953922. Its totient is φ = 23953920.

The previous prime is 23953873. The next prime is 23953931. The reversal of 23953921 is 12935932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21520321 + 2433600 = 4639^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 23953921 - 2¹⁹ = 23429633 is a prime.

It is not a weakly prime, because it can be changed into another prime (23953931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11976960 + 11976961.

It is an arithmetic number, because the mean of its divisors is an integer number (11976961).

Almost surely, 2^23953921 is an apocalyptic number.

It is an amenable number.

23953921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23953921 is an equidigital number, since it uses as much as digits as its factorization.

23953921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 23953921 is about 4894.2743078009. The cubic root of 23953921 is about 288.2651918526.

The spelling of 23953921 in words is "twenty-three million, nine hundred fifty-three thousand, nine hundred twenty-one".