685324171 has 4 divisors (see below), whose sum is σ = 783227632. Its totient is φ = 587420712.

The previous prime is 685324147. The next prime is 685324177. The reversal of 685324171 is 171423586.

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

It is a cyclic number.

It is not a de Polignac number, because 685324171 - 2⁹ = 685323659 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 685324171.

It is not an unprimeable number, because it can be changed into a prime (685324177) 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, 48951720 + ... + 48951733.

It is an arithmetic number, because the mean of its divisors is an integer number (195806908).

Almost surely, 2^685324171 is an apocalyptic number.

685324171 is a deficient number, since it is larger than the sum of its proper divisors (97903461).

685324171 is an equidigital number, since it uses as much as digits as its factorization.

685324171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97903460.

The product of its digits is 40320, while the sum is 37.

The square root of 685324171 is about 26178.6968927027. The cubic root of 685324171 is about 881.6550169133.

The spelling of 685324171 in words is "six hundred eighty-five million, three hundred twenty-four thousand, one hundred seventy-one".