23905157 has 2 divisors, whose sum is σ = 23905158. Its totient is φ = 23905156.

The previous prime is 23905139. The next prime is 23905159. The reversal of 23905157 is 75150932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19351201 + 4553956 = 4399^2 + 2134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23905157 is a prime.

Together with 23905159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23905159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11952578 + 11952579.

It is an arithmetic number, because the mean of its divisors is an integer number (11952579).

Almost surely, 2^23905157 is an apocalyptic number.

It is an amenable number.

23905157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23905157 is an equidigital number, since it uses as much as digits as its factorization.

23905157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 23905157 is about 4889.2900302600. The cubic root of 23905157 is about 288.0694477905.

The spelling of 23905157 in words is "twenty-three million, nine hundred five thousand, one hundred fifty-seven".