23404009 has 2 divisors, whose sum is σ = 23404010. Its totient is φ = 23404008.

The previous prime is 23404001. The next prime is 23404021. The reversal of 23404009 is 90040432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22771984 + 632025 = 4772^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 23404009 - 2³ = 23404001 is a prime.

It is a super-3 number, since 3×23404009³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23404001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11702004 + 11702005.

It is an arithmetic number, because the mean of its divisors is an integer number (11702005).

Almost surely, 2^23404009 is an apocalyptic number.

It is an amenable number.

23404009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23404009 is an equidigital number, since it uses as much as digits as its factorization.

23404009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 23404009 is about 4837.7690106081. The cubic root of 23404009 is about 286.0421841048.

The spelling of 23404009 in words is "twenty-three million, four hundred four thousand, nine".