313235309 has 4 divisors (see below), whose sum is σ = 313617660. Its totient is φ = 312852960.

The previous prime is 313235287. The next prime is 313235339. The reversal of 313235309 is 903532313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903532313 = 59 ⋅15314107.

It can be written as a sum of positive squares in 2 ways, for example, as 94284100 + 218951209 = 9710^2 + 14797^2 .

It is a cyclic number.

It is not a de Polignac number, because 313235309 - 2¹² = 313231213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313235339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189944 + ... + 191585.

It is an arithmetic number, because the mean of its divisors is an integer number (78404415).

Almost surely, 2^313235309 is an apocalyptic number.

It is an amenable number.

313235309 is a deficient number, since it is larger than the sum of its proper divisors (382351).

313235309 is an equidigital number, since it uses as much as digits as its factorization.

313235309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382350.

The product of its (nonzero) digits is 7290, while the sum is 29.

The square root of 313235309 is about 17698.4549890661. The cubic root of 313235309 is about 679.1362367554.

The spelling of 313235309 in words is "three hundred thirteen million, two hundred thirty-five thousand, three hundred nine".