684173713 has 4 divisors (see below), whose sum is σ = 707765940. Its totient is φ = 660581488.

The previous prime is 684173681. The next prime is 684173719. The reversal of 684173713 is 317371486.

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 123810129 + 560363584 = 11127^2 + 23672^2 .

It is not a de Polignac number, because 684173713 - 2⁵ = 684173681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684173719) 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, 11796070 + ... + 11796127.

It is an arithmetic number, because the mean of its divisors is an integer number (176941485).

Almost surely, 2^684173713 is an apocalyptic number.

It is an amenable number.

684173713 is a deficient number, since it is larger than the sum of its proper divisors (23592227).

684173713 is a wasteful number, since it uses less digits than its factorization.

684173713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23592226.

The product of its digits is 84672, while the sum is 40.

The square root of 684173713 is about 26156.7144916941. The cubic root of 684173713 is about 881.1613939852.

The spelling of 684173713 in words is "six hundred eighty-four million, one hundred seventy-three thousand, seven hundred thirteen".