23502989 has 2 divisors, whose sum is σ = 23502990. Its totient is φ = 23502988.

The previous prime is 23502953. The next prime is 23503013. The reversal of 23502989 is 98920532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 3833764 = 4435^2 + 1958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23502989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23507989) 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, 11751494 + 11751495.

It is an arithmetic number, because the mean of its divisors is an integer number (11751495).

Almost surely, 2^23502989 is an apocalyptic number.

It is an amenable number.

23502989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23502989 is an equidigital number, since it uses as much as digits as its factorization.

23502989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 23502989 is about 4847.9881394244. The cubic root of 23502989 is about 286.4448592189. Note that the first 3 decimals are identical.

The spelling of 23502989 in words is "twenty-three million, five hundred two thousand, nine hundred eighty-nine".