23521739 has 2 divisors, whose sum is σ = 23521740. Its totient is φ = 23521738.

The previous prime is 23521711. The next prime is 23521781. The reversal of 23521739 is 93712532.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23521739 - 2⁸ = 23521483 is a prime.

It is not a weakly prime, because it can be changed into another prime (23521039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760869 + 11760870.

It is an arithmetic number, because the mean of its divisors is an integer number (11760870).

Almost surely, 2^23521739 is an apocalyptic number.

23521739 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521739 is an equidigital number, since it uses as much as digits as its factorization.

23521739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 23521739 is about 4849.9215457572. The cubic root of 23521739 is about 286.5210114267.

The spelling of 23521739 in words is "twenty-three million, five hundred twenty-one thousand, seven hundred thirty-nine".