23562989 has 2 divisors, whose sum is σ = 23562990. Its totient is φ = 23562988.

The previous prime is 23562977. The next prime is 23562991. The reversal of 23562989 is 98926532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 7022500 = 4067^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 23562989 - 2⁸ = 23562733 is a prime.

It is a super-2 number, since 2×23562989² = 1110428901228242, which contains 22 as substring.

Together with 23562991, 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 (23562389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11781494 + 11781495.

It is an arithmetic number, because the mean of its divisors is an integer number (11781495).

Almost surely, 2^23562989 is an apocalyptic number.

It is an amenable number.

23562989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23562989 is an equidigital number, since it uses as much as digits as its factorization.

23562989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 23562989 is about 4854.1723290382. The cubic root of 23562989 is about 286.6884039463.

The spelling of 23562989 in words is "twenty-three million, five hundred sixty-two thousand, nine hundred eighty-nine".