12304309 has 2 divisors, whose sum is σ = 12304310. Its totient is φ = 12304308.

The previous prime is 12304301. The next prime is 12304319. The reversal of 12304309 is 90340321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11881809 + 422500 = 3447^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 12304309 - 2³ = 12304301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12304309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12304301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152154 + 6152155.

It is an arithmetic number, because the mean of its divisors is an integer number (6152155).

Almost surely, 2^12304309 is an apocalyptic number.

It is an amenable number.

12304309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12304309 is an equidigital number, since it uses as much as digits as its factorization.

12304309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 12304309 is about 3507.7498485496. The cubic root of 12304309 is about 230.8619766038.

The spelling of 12304309 in words is "twelve million, three hundred four thousand, three hundred nine".