23136857 has 2 divisors, whose sum is σ = 23136858. Its totient is φ = 23136856.

The previous prime is 23136853. The next prime is 23136887. The reversal of 23136857 is 75863132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15178816 + 7958041 = 3896^2 + 2821^2 .

It is a cyclic number.

It is not a de Polignac number, because 23136857 - 2² = 23136853 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23136853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11568428 + 11568429.

It is an arithmetic number, because the mean of its divisors is an integer number (11568429).

Almost surely, 2^23136857 is an apocalyptic number.

It is an amenable number.

23136857 is a deficient number, since it is larger than the sum of its proper divisors (1).

23136857 is an equidigital number, since it uses as much as digits as its factorization.

23136857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 23136857 is about 4810.0786895850. The cubic root of 23136857 is about 284.9496453563.

Adding to 23136857 its reverse (75863132), we get a palindrome (98999989).

The spelling of 23136857 in words is "twenty-three million, one hundred thirty-six thousand, eight hundred fifty-seven".