313645 has 8 divisors (see below), whose sum is σ = 379800. Its totient is φ = 248640.

The previous prime is 313639. The next prime is 313661. The reversal of 313645 is 546313.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 293764 = 141^2 + 542^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 313645 - 2³ = 313637 is a prime.

It is a super-3 number, since 3×313645³ = 92562773792433375, which contains 333 as substring.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (47475).

2³¹³⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

313645 is a deficient number, since it is larger than the sum of its proper divisors (66155).

313645 is a wasteful number, since it uses less digits than its factorization.

313645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575.

The product of its digits is 1080, while the sum is 22.

The square root of 313645 is about 560.0401771302. The cubic root of 313645 is about 67.9432196139.

Adding to 313645 its reverse (546313), we get a palindrome (859958).

The spelling of 313645 in words is "three hundred thirteen thousand, six hundred forty-five".