23647661 has 2 divisors, whose sum is σ = 23647662. Its totient is φ = 23647660.

The previous prime is 23647649. The next prime is 23647681. The reversal of 23647661 is 16674632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 10824100 = 3581^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 23647661 - 2¹⁴ = 23631277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23647601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11823830 + 11823831.

It is an arithmetic number, because the mean of its divisors is an integer number (11823831).

Almost surely, 2^23647661 is an apocalyptic number.

It is an amenable number.

23647661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23647661 is an equidigital number, since it uses as much as digits as its factorization.

23647661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 23647661 is about 4862.8860772179. The cubic root of 23647661 is about 287.0313918727.

The spelling of 23647661 in words is "twenty-three million, six hundred forty-seven thousand, six hundred sixty-one".