23767621 has 2 divisors, whose sum is σ = 23767622. Its totient is φ = 23767620.

The previous prime is 23767609. The next prime is 23767637. The reversal of 23767621 is 12676732.

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., 21958596 + 1809025 = 4686^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 23767621 - 2⁷ = 23767493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23167621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11883810 + 11883811.

It is an arithmetic number, because the mean of its divisors is an integer number (11883811).

Almost surely, 2^23767621 is an apocalyptic number.

It is an amenable number.

23767621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23767621 is an equidigital number, since it uses as much as digits as its factorization.

23767621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 23767621 is about 4875.2047136505. The cubic root of 23767621 is about 287.5159250158.

The spelling of 23767621 in words is "twenty-three million, seven hundred sixty-seven thousand, six hundred twenty-one".