23656637 has 2 divisors, whose sum is σ = 23656638. Its totient is φ = 23656636.

The previous prime is 23656621. The next prime is 23656657. The reversal of 23656637 is 73665632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20484676 + 3171961 = 4526^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 23656637 - 2⁴ = 23656621 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23656637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23656657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11828318 + 11828319.

It is an arithmetic number, because the mean of its divisors is an integer number (11828319).

Almost surely, 2^23656637 is an apocalyptic number.

It is an amenable number.

23656637 is a deficient number, since it is larger than the sum of its proper divisors (1).

23656637 is an equidigital number, since it uses as much as digits as its factorization.

23656637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 38.

The square root of 23656637 is about 4863.8088983841. The cubic root of 23656637 is about 287.0677036792.

The spelling of 23656637 in words is "twenty-three million, six hundred fifty-six thousand, six hundred thirty-seven".