23972621 has 2 divisors, whose sum is σ = 23972622. Its totient is φ = 23972620.

The previous prime is 23972603. The next prime is 23972687. The reversal of 23972621 is 12627932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21031396 + 2941225 = 4586^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 23972621 - 2¹⁴ = 23956237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23972521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11986310 + 11986311.

It is an arithmetic number, because the mean of its divisors is an integer number (11986311).

Almost surely, 2^23972621 is an apocalyptic number.

It is an amenable number.

23972621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23972621 is an equidigital number, since it uses as much as digits as its factorization.

23972621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 23972621 is about 4896.1843306804. The cubic root of 23972621 is about 288.3401852389.

The spelling of 23972621 in words is "twenty-three million, nine hundred seventy-two thousand, six hundred twenty-one".