313409 has 2 divisors, whose sum is σ = 313410. Its totient is φ = 313408.

The previous prime is 313399. The next prime is 313471. The reversal of 313409 is 904313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297025 + 16384 = 545^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 313409 - 2⁸ = 313153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (313009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156704 + 156705.

It is an arithmetic number, because the mean of its divisors is an integer number (156705).

2³¹³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

313409 is a deficient number, since it is larger than the sum of its proper divisors (1).

313409 is an equidigital number, since it uses as much as digits as its factorization.

313409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 313409 is about 559.8294383113. The cubic root of 313409 is about 67.9261742036.

The spelling of 313409 in words is "three hundred thirteen thousand, four hundred nine".