23556889 has 2 divisors, whose sum is σ = 23556890. Its totient is φ = 23556888.

The previous prime is 23556887. The next prime is 23556913. The reversal of 23556889 is 98865532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20097289 + 3459600 = 4483^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 23556889 - 2¹ = 23556887 is a prime.

Together with 23556887, it forms a pair of twin primes.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (23556887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778444 + 11778445.

It is an arithmetic number, because the mean of its divisors is an integer number (11778445).

Almost surely, 2^23556889 is an apocalyptic number.

It is an amenable number.

23556889 is a deficient number, since it is larger than the sum of its proper divisors (1).

23556889 is an equidigital number, since it uses as much as digits as its factorization.

23556889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 46.

The square root of 23556889 is about 4853.5439629203. The cubic root of 23556889 is about 286.6636624588.

The spelling of 23556889 in words is "twenty-three million, five hundred fifty-six thousand, eight hundred eighty-nine".