23911889 has 2 divisors, whose sum is σ = 23911890. Its totient is φ = 23911888.

The previous prime is 23911883. The next prime is 23911903. The reversal of 23911889 is 98811932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18190225 + 5721664 = 4265^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 23911889 - 2¹⁶ = 23846353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23911883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11955944 + 11955945.

It is an arithmetic number, because the mean of its divisors is an integer number (11955945).

Almost surely, 2^23911889 is an apocalyptic number.

It is an amenable number.

23911889 is a deficient number, since it is larger than the sum of its proper divisors (1).

23911889 is an equidigital number, since it uses as much as digits as its factorization.

23911889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 23911889 is about 4889.9784253103. The cubic root of 23911889 is about 288.0964866076.

The spelling of 23911889 in words is "twenty-three million, nine hundred eleven thousand, eight hundred eighty-nine".