23128499 has 2 divisors, whose sum is σ = 23128500. Its totient is φ = 23128498.

The previous prime is 23128489. The next prime is 23128507. The reversal of 23128499 is 99482132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23128499 - 2²⁴ = 6351283 is a prime.

It is not a weakly prime, because it can be changed into another prime (23128489) 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, 11564249 + 11564250.

It is an arithmetic number, because the mean of its divisors is an integer number (11564250).

Almost surely, 2^23128499 is an apocalyptic number.

23128499 is a deficient number, since it is larger than the sum of its proper divisors (1).

23128499 is an equidigital number, since it uses as much as digits as its factorization.

23128499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 23128499 is about 4809.2098103535. The cubic root of 23128499 is about 284.9153293157.

The spelling of 23128499 in words is "twenty-three million, one hundred twenty-eight thousand, four hundred ninety-nine".