22623661 has 4 divisors (see below), whose sum is σ = 23814400. Its totient is φ = 21432924.

The previous prime is 22623659. The next prime is 22623691. The reversal of 22623661 is 16632622.

It is a happy number.

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 22623661 - 2¹ = 22623659 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 (22623611) 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, 595341 + ... + 595378.

It is an arithmetic number, because the mean of its divisors is an integer number (5953600).

Almost surely, 2^22623661 is an apocalyptic number.

It is an amenable number.

22623661 is a deficient number, since it is larger than the sum of its proper divisors (1190739).

22623661 is a wasteful number, since it uses less digits than its factorization.

22623661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190738.

The product of its digits is 5184, while the sum is 28.

The square root of 22623661 is about 4756.4336429724. The cubic root of 22623661 is about 282.8270616171.

The spelling of 22623661 in words is "twenty-two million, six hundred twenty-three thousand, six hundred sixty-one".