23123657 has 2 divisors, whose sum is σ = 23123658. Its totient is φ = 23123656.

The previous prime is 23123563. The next prime is 23123677. The reversal of 23123657 is 75632132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 5112121 = 4244^2 + 2261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23123657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23123677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561828 + 11561829.

It is an arithmetic number, because the mean of its divisors is an integer number (11561829).

Almost surely, 2^23123657 is an apocalyptic number.

It is an amenable number.

23123657 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123657 is an equidigital number, since it uses as much as digits as its factorization.

23123657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 23123657 is about 4808.7063748996. The cubic root of 23123657 is about 284.8954453865.

Adding to 23123657 its reverse (75632132), we get a palindrome (98755789).

The spelling of 23123657 in words is "twenty-three million, one hundred twenty-three thousand, six hundred fifty-seven".