391313 has 8 divisors (see below), whose sum is σ = 435456. Its totient is φ = 349200.

The previous prime is 391301. The next prime is 391331. The reversal of 391313 is 313193.

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

It is a cyclic number.

It is not a de Polignac number, because 391313 - 2⁶ = 391249 is a prime.

It is a Duffinian number.

391313 is a modest number, since divided by 1313 gives 39 as remainder.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (391373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83 + ... + 888.

It is an arithmetic number, because the mean of its divisors is an integer number (54432).

2³⁹¹³¹³ is an apocalyptic number.

It is an amenable number.

391313 is a deficient number, since it is larger than the sum of its proper divisors (44143).

391313 is a wasteful number, since it uses less digits than its factorization.

391313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its digits is 243, while the sum is 20.

The square root of 391313 is about 625.5501578611. The cubic root of 391313 is about 73.1433350668.

The spelling of 391313 in words is "three hundred ninety-one thousand, three hundred thirteen".