23128657 has 2 divisors, whose sum is σ = 23128658. Its totient is φ = 23128656.

The previous prime is 23128613. The next prime is 23128667. The reversal of 23128657 is 75682132.

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., 20034576 + 3094081 = 4476^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 23128657 - 2¹⁵ = 23095889 is a prime.

It is not a weakly prime, because it can be changed into another prime (23128667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11564328 + 11564329.

It is an arithmetic number, because the mean of its divisors is an integer number (11564329).

Almost surely, 2^23128657 is an apocalyptic number.

It is an amenable number.

23128657 is a deficient number, since it is larger than the sum of its proper divisors (1).

23128657 is an equidigital number, since it uses as much as digits as its factorization.

23128657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 23128657 is about 4809.2262371404. The cubic root of 23128657 is about 284.9159781043.

The spelling of 23128657 in words is "twenty-three million, one hundred twenty-eight thousand, six hundred fifty-seven".