23713721 has 2 divisors, whose sum is σ = 23713722. Its totient is φ = 23713720.

The previous prime is 23713699. The next prime is 23713763. The reversal of 23713721 is 12731732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23658496 + 55225 = 4864^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 23713721 - 2¹⁰ = 23712697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23713421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11856860 + 11856861.

It is an arithmetic number, because the mean of its divisors is an integer number (11856861).

Almost surely, 2^23713721 is an apocalyptic number.

It is an amenable number.

23713721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23713721 is an equidigital number, since it uses as much as digits as its factorization.

23713721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 26.

The square root of 23713721 is about 4869.6736030252. The cubic root of 23713721 is about 287.2984184919.

The spelling of 23713721 in words is "twenty-three million, seven hundred thirteen thousand, seven hundred twenty-one".