23992009 has 2 divisors, whose sum is σ = 23992010. Its totient is φ = 23992008.

The previous prime is 23991983. The next prime is 23992027. The reversal of 23992009 is 90029932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13286025 + 10705984 = 3645^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 23992009 - 2⁵ = 23991977 is a prime.

It is not a weakly prime, because it can be changed into another prime (23992069) 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, 11996004 + 11996005.

It is an arithmetic number, because the mean of its divisors is an integer number (11996005).

Almost surely, 2^23992009 is an apocalyptic number.

It is an amenable number.

23992009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23992009 is an equidigital number, since it uses as much as digits as its factorization.

23992009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 23992009 is about 4898.1638396444. The cubic root of 23992009 is about 288.4178965735.

The spelling of 23992009 in words is "twenty-three million, nine hundred ninety-two thousand, nine".