23132309 has 2 divisors, whose sum is σ = 23132310. Its totient is φ = 23132308.

The previous prime is 23132303. The next prime is 23132311. The reversal of 23132309 is 90323132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20729809 + 2402500 = 4553^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 23132309 - 2¹² = 23128213 is a prime.

It is a Sophie Germain prime.

Together with 23132311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23132303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11566154 + 11566155.

It is an arithmetic number, because the mean of its divisors is an integer number (11566155).

Almost surely, 2^23132309 is an apocalyptic number.

It is an amenable number.

23132309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23132309 is an equidigital number, since it uses as much as digits as its factorization.

23132309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 23132309 is about 4809.6059090117. The cubic root of 23132309 is about 284.9309733314.

The spelling of 23132309 in words is "twenty-three million, one hundred thirty-two thousand, three hundred nine".