23561761 has 2 divisors, whose sum is σ = 23561762. Its totient is φ = 23561760.

The previous prime is 23561753. The next prime is 23561773. The reversal of 23561761 is 16716532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23425600 + 136161 = 4840^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 23561761 - 2³ = 23561753 is a prime.

It is a super-2 number, since 2×23561761² = 1110313162842242, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (23561561) 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 as a sum of consecutive naturals, namely, 11780880 + 11780881.

It is an arithmetic number, because the mean of its divisors is an integer number (11780881).

Almost surely, 2^23561761 is an apocalyptic number.

It is an amenable number.

23561761 is a deficient number, since it is larger than the sum of its proper divisors (1).

23561761 is an equidigital number, since it uses as much as digits as its factorization.

23561761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 23561761 is about 4854.0458382673. The cubic root of 23561761 is about 286.6834235442.

The spelling of 23561761 in words is "twenty-three million, five hundred sixty-one thousand, seven hundred sixty-one".