23640961 has 2 divisors, whose sum is σ = 23640962. Its totient is φ = 23640960.

The previous prime is 23640943. The next prime is 23640979. The reversal of 23640961 is 16904632.

It is a balanced prime because it is at equal distance from previous prime (23640943) and next prime (23640979).

It can be written as a sum of positive squares in only one way, i.e., 15484225 + 8156736 = 3935^2 + 2856^2 .

It is a cyclic number.

It is not a de Polignac number, because 23640961 - 2⁷ = 23640833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23647961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11820480 + 11820481.

It is an arithmetic number, because the mean of its divisors is an integer number (11820481).

Almost surely, 2^23640961 is an apocalyptic number.

It is an amenable number.

23640961 is a deficient number, since it is larger than the sum of its proper divisors (1).

23640961 is an equidigital number, since it uses as much as digits as its factorization.

23640961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 23640961 is about 4862.1971370976. The cubic root of 23640961 is about 287.0042814822.

The spelling of 23640961 in words is "twenty-three million, six hundred forty thousand, nine hundred sixty-one".