23721701 has 2 divisors, whose sum is σ = 23721702. Its totient is φ = 23721700.

The previous prime is 23721689. The next prime is 23721703. The reversal of 23721701 is 10712732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17724100 + 5997601 = 4210^2 + 2449^2 .

It is a cyclic number.

It is not a de Polignac number, because 23721701 - 2⁶ = 23721637 is a prime.

Together with 23721703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23721703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11860850 + 11860851.

It is an arithmetic number, because the mean of its divisors is an integer number (11860851).

Almost surely, 2^23721701 is an apocalyptic number.

It is an amenable number.

23721701 is a deficient number, since it is larger than the sum of its proper divisors (1).

23721701 is an equidigital number, since it uses as much as digits as its factorization.

23721701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 23721701 is about 4870.4928908684. The cubic root of 23721701 is about 287.3306415279.

The spelling of 23721701 in words is "twenty-three million, seven hundred twenty-one thousand, seven hundred one".