23881609 has 2 divisors, whose sum is σ = 23881610. Its totient is φ = 23881608.

The previous prime is 23881603. The next prime is 23881667. The reversal of 23881609 is 90618832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 8982009 = 3860^2 + 2997^2 .

It is a cyclic number.

It is not a de Polignac number, because 23881609 - 2³ = 23881601 is a prime.

It is not a weakly prime, because it can be changed into another prime (23881601) 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, 11940804 + 11940805.

It is an arithmetic number, because the mean of its divisors is an integer number (11940805).

Almost surely, 2^23881609 is an apocalyptic number.

It is an amenable number.

23881609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23881609 is an equidigital number, since it uses as much as digits as its factorization.

23881609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 23881609 is about 4886.8813163407. The cubic root of 23881609 is about 287.9748282077.

The spelling of 23881609 in words is "twenty-three million, eight hundred eighty-one thousand, six hundred nine".