23561869 has 2 divisors, whose sum is σ = 23561870. Its totient is φ = 23561868.

The previous prime is 23561861. The next prime is 23561873. The reversal of 23561869 is 96816532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23164969 + 396900 = 4813^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 23561869 - 2³ = 23561861 is a prime.

It is a super-2 number, since 2×23561869² = 1110323341546322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23561861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11780934 + 11780935.

It is an arithmetic number, because the mean of its divisors is an integer number (11780935).

Almost surely, 2^23561869 is an apocalyptic number.

It is an amenable number.

23561869 is a deficient number, since it is larger than the sum of its proper divisors (1).

23561869 is an equidigital number, since it uses as much as digits as its factorization.

23561869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 23561869 is about 4854.0569629950. The cubic root of 23561869 is about 286.6838615670.

It can be divided in two parts, 2356 and 1869, that added together give a square (4225 = 65²).

The spelling of 23561869 in words is "twenty-three million, five hundred sixty-one thousand, eight hundred sixty-nine".