23308889 has 2 divisors, whose sum is σ = 23308890. Its totient is φ = 23308888.

The previous prime is 23308847. The next prime is 23308891. The reversal of 23308889 is 98880332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17572864 + 5736025 = 4192^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 23308889 - 2⁸ = 23308633 is a prime.

Together with 23308891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23308829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11654444 + 11654445.

It is an arithmetic number, because the mean of its divisors is an integer number (11654445).

Almost surely, 2^23308889 is an apocalyptic number.

It is an amenable number.

23308889 is a deficient number, since it is larger than the sum of its proper divisors (1).

23308889 is an equidigital number, since it uses as much as digits as its factorization.

23308889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 23308889 is about 4827.9280234900. The cubic root of 23308889 is about 285.6541412330.

The spelling of 23308889 in words is "twenty-three million, three hundred eight thousand, eight hundred eighty-nine".