23305309 has 2 divisors, whose sum is σ = 23305310. Its totient is φ = 23305308.

The previous prime is 23305307. The next prime is 23305313. The reversal of 23305309 is 90350332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 10381284 = 3595^2 + 3222^2 .

It is a cyclic number.

It is not a de Polignac number, because 23305309 - 2¹ = 23305307 is a prime.

Together with 23305307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23305307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11652654 + 11652655.

It is an arithmetic number, because the mean of its divisors is an integer number (11652655).

Almost surely, 2^23305309 is an apocalyptic number.

It is an amenable number.

23305309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23305309 is an equidigital number, since it uses as much as digits as its factorization.

23305309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 23305309 is about 4827.5572497900. The cubic root of 23305309 is about 285.6395159944.

The spelling of 23305309 in words is "twenty-three million, three hundred five thousand, three hundred nine".