23998189 has 2 divisors, whose sum is σ = 23998190. Its totient is φ = 23998188.

The previous prime is 23998181. The next prime is 23998201. The reversal of 23998189 is 98189932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 7064964 = 4115^2 + 2658^2 .

It is a cyclic number.

It is not a de Polignac number, because 23998189 - 2³ = 23998181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23998181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11999094 + 11999095.

It is an arithmetic number, because the mean of its divisors is an integer number (11999095).

Almost surely, 2^23998189 is an apocalyptic number.

It is an amenable number.

23998189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23998189 is an equidigital number, since it uses as much as digits as its factorization.

23998189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 23998189 is about 4898.7946476659. The cubic root of 23998189 is about 288.4426585624.

The spelling of 23998189 in words is "twenty-three million, nine hundred ninety-eight thousand, one hundred eighty-nine".