23745989 has 2 divisors, whose sum is σ = 23745990. Its totient is φ = 23745988.

The previous prime is 23745947. The next prime is 23746013. The reversal of 23745989 is 98954732.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15737089 + 8008900 = 3967^2 + 2830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23745989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23745089) 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, 11872994 + 11872995.

It is an arithmetic number, because the mean of its divisors is an integer number (11872995).

Almost surely, 2^23745989 is an apocalyptic number.

It is an amenable number.

23745989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23745989 is an equidigital number, since it uses as much as digits as its factorization.

23745989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 23745989 is about 4872.9856351112. The cubic root of 23745989 is about 287.4286714038.

The spelling of 23745989 in words is "twenty-three million, seven hundred forty-five thousand, nine hundred eighty-nine".