684941713 has 4 divisors (see below), whose sum is σ = 725232420. Its totient is φ = 644651008.

The previous prime is 684941707. The next prime is 684941717. The reversal of 684941713 is 317149486.

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

It can be written as a sum of positive squares in 2 ways, for example, as 475763344 + 209178369 = 21812^2 + 14463^2 .

It is a cyclic number.

It is not a de Polignac number, because 684941713 - 2⁵ = 684941681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684941713.

It is not an unprimeable number, because it can be changed into a prime (684941717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20145328 + ... + 20145361.

It is an arithmetic number, because the mean of its divisors is an integer number (181308105).

Almost surely, 2^684941713 is an apocalyptic number.

It is an amenable number.

684941713 is a deficient number, since it is larger than the sum of its proper divisors (40290707).

684941713 is a wasteful number, since it uses less digits than its factorization.

684941713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40290706.

The product of its digits is 145152, while the sum is 43.

The square root of 684941713 is about 26171.3911170194. The cubic root of 684941713 is about 881.4909783583.

It can be divided in two parts, 68494 and 1713, that added together give a palindrome (70207).

The spelling of 684941713 in words is "six hundred eighty-four million, nine hundred forty-one thousand, seven hundred thirteen".