23498309 has 2 divisors, whose sum is σ = 23498310. Its totient is φ = 23498308.

The previous prime is 23498297. The next prime is 23498311. The reversal of 23498309 is 90389432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23493409 + 4900 = 4847^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 23498309 - 2⁸ = 23498053 is a prime.

Together with 23498311, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23498389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11749154 + 11749155.

It is an arithmetic number, because the mean of its divisors is an integer number (11749155).

Almost surely, 2^23498309 is an apocalyptic number.

It is an amenable number.

23498309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23498309 is an equidigital number, since it uses as much as digits as its factorization.

23498309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 23498309 is about 4847.5054409459. The cubic root of 23498309 is about 286.4258453120.

The spelling of 23498309 in words is "twenty-three million, four hundred ninety-eight thousand, three hundred nine".