23642249 has 2 divisors, whose sum is σ = 23642250. Its totient is φ = 23642248.

The previous prime is 23642239. The next prime is 23642261. The reversal of 23642249 is 94224632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22705225 + 937024 = 4765^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 23642249 - 2⁸ = 23641993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23642239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821124 + 11821125.

It is an arithmetic number, because the mean of its divisors is an integer number (11821125).

Almost surely, 2^23642249 is an apocalyptic number.

It is an amenable number.

23642249 is a deficient number, since it is larger than the sum of its proper divisors (1).

23642249 is an equidigital number, since it uses as much as digits as its factorization.

23642249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 23642249 is about 4862.3295857027. The cubic root of 23642249 is about 287.0094935489.

The spelling of 23642249 in words is "twenty-three million, six hundred forty-two thousand, two hundred forty-nine".