23961621 has 8 divisors (see below), whose sum is σ = 32692000. Its totient is φ = 15602832.

The previous prime is 23961601. The next prime is 23961649. The reversal of 23961621 is 12616932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23961621 - 2¹⁸ = 23699477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23961601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92746 + ... + 93003.

It is an arithmetic number, because the mean of its divisors is an integer number (4086500).

Almost surely, 2^23961621 is an apocalyptic number.

It is an amenable number.

23961621 is a deficient number, since it is larger than the sum of its proper divisors (8730379).

23961621 is a wasteful number, since it uses less digits than its factorization.

23961621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185795.

The product of its digits is 3888, while the sum is 30.

The square root of 23961621 is about 4895.0608780688. The cubic root of 23961621 is about 288.2960762074.

The spelling of 23961621 in words is "twenty-three million, nine hundred sixty-one thousand, six hundred twenty-one".