23621761 has 2 divisors, whose sum is σ = 23621762. Its totient is φ = 23621760.

The previous prime is 23621743. The next prime is 23621809. The reversal of 23621761 is 16712632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21160000 + 2461761 = 4600^2 + 1569^2 .

It is a cyclic number.

It is not a de Polignac number, because 23621761 - 2⁹ = 23621249 is a prime.

It is a super-2 number, since 2×23621761² = 1115975185482242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23621261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11810880 + 11810881.

It is an arithmetic number, because the mean of its divisors is an integer number (11810881).

Almost surely, 2^23621761 is an apocalyptic number.

It is an amenable number.

23621761 is a deficient number, since it is larger than the sum of its proper divisors (1).

23621761 is an equidigital number, since it uses as much as digits as its factorization.

23621761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 23621761 is about 4860.2223200179. Note that the first 3 decimals coincide. The cubic root of 23621761 is about 286.9265636227.

The spelling of 23621761 in words is "twenty-three million, six hundred twenty-one thousand, seven hundred sixty-one".