23912321 has 2 divisors, whose sum is σ = 23912322. Its totient is φ = 23912320.

The previous prime is 23912297. The next prime is 23912333. The reversal of 23912321 is 12321932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23902321 + 10000 = 4889^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23912321 is a prime.

It is not a weakly prime, because it can be changed into another prime (23912351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11956160 + 11956161.

It is an arithmetic number, because the mean of its divisors is an integer number (11956161).

Almost surely, 2^23912321 is an apocalyptic number.

It is an amenable number.

23912321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23912321 is an equidigital number, since it uses as much as digits as its factorization.

23912321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 23912321 is about 4890.0225970848. The cubic root of 23912321 is about 288.0982215456.

The spelling of 23912321 in words is "twenty-three million, nine hundred twelve thousand, three hundred twenty-one".