23439109 has 2 divisors, whose sum is σ = 23439110. Its totient is φ = 23439108.

The previous prime is 23439089. The next prime is 23439149. The reversal of 23439109 is 90193432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 3814209 = 4430^2 + 1953^2 .

It is a cyclic number.

It is not a de Polignac number, because 23439109 - 2⁵ = 23439077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23439149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11719554 + 11719555.

It is an arithmetic number, because the mean of its divisors is an integer number (11719555).

Almost surely, 2^23439109 is an apocalyptic number.

It is an amenable number.

23439109 is a deficient number, since it is larger than the sum of its proper divisors (1).

23439109 is an equidigital number, since it uses as much as digits as its factorization.

23439109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 23439109 is about 4841.3953567128. The cubic root of 23439109 is about 286.1851092715.

The spelling of 23439109 in words is "twenty-three million, four hundred thirty-nine thousand, one hundred nine".