23523661 has 4 divisors (see below), whose sum is σ = 26884192. Its totient is φ = 20163132.

The previous prime is 23523659. The next prime is 23523667. The reversal of 23523661 is 16632532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23523661 - 2¹ = 23523659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23523667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680255 + ... + 1680268.

It is an arithmetic number, because the mean of its divisors is an integer number (6721048).

Almost surely, 2^23523661 is an apocalyptic number.

It is an amenable number.

23523661 is a deficient number, since it is larger than the sum of its proper divisors (3360531).

23523661 is an equidigital number, since it uses as much as digits as its factorization.

23523661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360530.

The product of its digits is 6480, while the sum is 28.

The square root of 23523661 is about 4850.1196892448. The cubic root of 23523661 is about 286.5288152486.

The spelling of 23523661 in words is "twenty-three million, five hundred twenty-three thousand, six hundred sixty-one".