23008409 has 2 divisors, whose sum is σ = 23008410. Its totient is φ = 23008408.

The previous prime is 23008393. The next prime is 23008549. The reversal of 23008409 is 90480032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22992025 + 16384 = 4795^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 23008409 - 2⁴ = 23008393 is a prime.

It is a super-2 number, since 2×23008409² = 1058773769422562, which contains 22 as substring.

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 (23008309) 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, 11504204 + 11504205.

It is an arithmetic number, because the mean of its divisors is an integer number (11504205).

Almost surely, 2^23008409 is an apocalyptic number.

It is an amenable number.

23008409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23008409 is an equidigital number, since it uses as much as digits as its factorization.

23008409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 23008409 is about 4796.7081420491. The cubic root of 23008409 is about 284.4213518455.

The spelling of 23008409 in words is "twenty-three million, eight thousand, four hundred nine".