315709 has 4 divisors (see below), whose sum is σ = 321120. Its totient is φ = 310300.

The previous prime is 315703. The next prime is 315739. The reversal of 315709 is 907513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315709 - 2³ = 315701 is a prime.

It is a Duffinian number.

315709 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2617 + ... + 2734.

It is an arithmetic number, because the mean of its divisors is an integer number (80280).

2³¹⁵⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

315709 is a deficient number, since it is larger than the sum of its proper divisors (5411).

315709 is an equidigital number, since it uses as much as digits as its factorization.

315709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 315709 is about 561.8798804015. The cubic root of 315709 is about 68.0919315984.

It can be divided in two parts, 315 and 709, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 315709 in words is "three hundred fifteen thousand, seven hundred nine".