23811889 has 2 divisors, whose sum is σ = 23811890. Its totient is φ = 23811888.

The previous prime is 23811847. The next prime is 23811911. The reversal of 23811889 is 98811832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23203489 + 608400 = 4817^2 + 780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23811889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23811829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11905944 + 11905945.

It is an arithmetic number, because the mean of its divisors is an integer number (11905945).

Almost surely, 2^23811889 is an apocalyptic number.

It is an amenable number.

23811889 is a deficient number, since it is larger than the sum of its proper divisors (1).

23811889 is an equidigital number, since it uses as much as digits as its factorization.

23811889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The square root of 23811889 is about 4879.7427186277. The cubic root of 23811889 is about 287.6943170276.

The spelling of 23811889 in words is "twenty-three million, eight hundred eleven thousand, eight hundred eighty-nine".