313643 has 4 divisors (see below), whose sum is σ = 342168. Its totient is φ = 285120.

The previous prime is 313639. The next prime is 313661. The reversal of 313643 is 346313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 313643 - 2² = 313639 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 313643.

It is not an unprimeable number, because it can be changed into a prime (313603) 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, 14246 + ... + 14267.

It is an arithmetic number, because the mean of its divisors is an integer number (85542).

2³¹³⁶⁴³ is an apocalyptic number.

313643 is a deficient number, since it is larger than the sum of its proper divisors (28525).

313643 is a wasteful number, since it uses less digits than its factorization.

313643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28524.

The product of its digits is 648, while the sum is 20.

The square root of 313643 is about 560.0383915412. The cubic root of 313643 is about 67.9430751972.

Adding to 313643 its reverse (346313), we get a palindrome (659956).

The spelling of 313643 in words is "three hundred thirteen thousand, six hundred forty-three".