23957189 has 2 divisors, whose sum is σ = 23957190. Its totient is φ = 23957188.

The previous prime is 23957183. The next prime is 23957209. The reversal of 23957189 is 98175932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15880225 + 8076964 = 3985^2 + 2842^2 .

It is a cyclic number.

It is not a de Polignac number, because 23957189 - 2⁴ = 23957173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23957183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11978594 + 11978595.

It is an arithmetic number, because the mean of its divisors is an integer number (11978595).

Almost surely, 2^23957189 is an apocalyptic number.

It is an amenable number.

23957189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23957189 is an equidigital number, since it uses as much as digits as its factorization.

23957189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 23957189 is about 4894.6081559201. The cubic root of 23957189 is about 288.2783004624.

The spelling of 23957189 in words is "twenty-three million, nine hundred fifty-seven thousand, one hundred eighty-nine".