23508257 has 2 divisors, whose sum is σ = 23508258. Its totient is φ = 23508256.

The previous prime is 23508227. The next prime is 23508259. The reversal of 23508257 is 75280532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 2062096 = 4631^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 23508257 - 2¹⁰ = 23507233 is a prime.

Together with 23508259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23508259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11754128 + 11754129.

It is an arithmetic number, because the mean of its divisors is an integer number (11754129).

Almost surely, 2^23508257 is an apocalyptic number.

It is an amenable number.

23508257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23508257 is an equidigital number, since it uses as much as digits as its factorization.

23508257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 23508257 is about 4848.5314271437. The cubic root of 23508257 is about 286.4662590330.

Adding to 23508257 its reverse (75280532), we get a palindrome (98788789).

The spelling of 23508257 in words is "twenty-three million, five hundred eight thousand, two hundred fifty-seven".