23755621 has 2 divisors, whose sum is σ = 23755622. Its totient is φ = 23755620.

The previous prime is 23755609. The next prime is 23755631. The reversal of 23755621 is 12655732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21986721 + 1768900 = 4689^2 + 1330^2 .

It is a cyclic number.

It is not a de Polignac number, because 23755621 - 2¹³ = 23747429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23755631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11877810 + 11877811.

It is an arithmetic number, because the mean of its divisors is an integer number (11877811).

Almost surely, 2^23755621 is an apocalyptic number.

It is an amenable number.

23755621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23755621 is an equidigital number, since it uses as much as digits as its factorization.

23755621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 23755621 is about 4873.9738407177. The cubic root of 23755621 is about 287.4675290360.

The spelling of 23755621 in words is "twenty-three million, seven hundred fifty-five thousand, six hundred twenty-one".