23645623 has 4 divisors (see below), whose sum is σ = 25036560. Its totient is φ = 22254688.

The previous prime is 23645617. The next prime is 23645669. The reversal of 23645623 is 32654632.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23645623 - 2¹³ = 23637431 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 (23645603) 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, 695443 + ... + 695476.

It is an arithmetic number, because the mean of its divisors is an integer number (6259140).

Almost surely, 2^23645623 is an apocalyptic number.

23645623 is a deficient number, since it is larger than the sum of its proper divisors (1390937).

23645623 is a wasteful number, since it uses less digits than its factorization.

23645623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390936.

The product of its digits is 25920, while the sum is 31.

The square root of 23645623 is about 4862.6765263587. The cubic root of 23645623 is about 287.0231460004.

Subtracting 23645623 from its reverse (32654632), we obtain a palindrome (9009009).

The spelling of 23645623 in words is "twenty-three million, six hundred forty-five thousand, six hundred twenty-three".