913309 has 2 divisors, whose sum is σ = 913310. Its totient is φ = 913308.

The previous prime is 913279. The next prime is 913321. The reversal of 913309 is 903319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 308025 = 778^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 913309 - 2⁹ = 912797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456654 + 456655.

It is an arithmetic number, because the mean of its divisors is an integer number (456655).

2⁹¹³³⁰⁹ is an apocalyptic number.

It is an amenable number.

913309 is a deficient number, since it is larger than the sum of its proper divisors (1).

913309 is an equidigital number, since it uses as much as digits as its factorization.

913309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 913309 is about 955.6720148670. The cubic root of 913309 is about 97.0225263869.

The spelling of 913309 in words is "nine hundred thirteen thousand, three hundred nine".