391713 has 16 divisors (see below), whose sum is σ = 623616. Its totient is φ = 213840.

The previous prime is 391711. The next prime is 391717. The reversal of 391713 is 317193.

It is not a de Polignac number, because 391713 - 2¹ = 391711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78 + ... + 888.

It is an arithmetic number, because the mean of its divisors is an integer number (38976).

2³⁹¹⁷¹³ is an apocalyptic number.

It is an amenable number.

391713 is a deficient number, since it is larger than the sum of its proper divisors (231903).

391713 is a wasteful number, since it uses less digits than its factorization.

391713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its digits is 567, while the sum is 24.

The square root of 391713 is about 625.8697947657. The cubic root of 391713 is about 73.1682489429.

The spelling of 391713 in words is "three hundred ninety-one thousand, seven hundred thirteen".