23988521 has 2 divisors, whose sum is σ = 23988522. Its totient is φ = 23988520.

The previous prime is 23988499. The next prime is 23988527. The reversal of 23988521 is 12588932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 8934121 = 3880^2 + 2989^2 .

It is a cyclic number.

It is not a de Polignac number, because 23988521 - 2¹⁰ = 23987497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23988527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11994260 + 11994261.

It is an arithmetic number, because the mean of its divisors is an integer number (11994261).

Almost surely, 2^23988521 is an apocalyptic number.

It is an amenable number.

23988521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23988521 is an equidigital number, since it uses as much as digits as its factorization.

23988521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 23988521 is about 4897.8077749132. The cubic root of 23988521 is about 288.4039189976.

The spelling of 23988521 in words is "twenty-three million, nine hundred eighty-eight thousand, five hundred twenty-one".