23656609 has 2 divisors, whose sum is σ = 23656610. Its totient is φ = 23656608.

The previous prime is 23656601. The next prime is 23656621. The reversal of 23656609 is 90665632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22896225 + 760384 = 4785^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 23656609 - 2³ = 23656601 is a prime.

It is not a weakly prime, because it can be changed into another prime (23656601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11828304 + 11828305.

It is an arithmetic number, because the mean of its divisors is an integer number (11828305).

Almost surely, 2^23656609 is an apocalyptic number.

It is an amenable number.

23656609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23656609 is an equidigital number, since it uses as much as digits as its factorization.

23656609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 23656609 is about 4863.8060199806. The cubic root of 23656609 is about 287.0675904213.

The spelling of 23656609 in words is "twenty-three million, six hundred fifty-six thousand, six hundred nine".