685180307 has 4 divisors (see below), whose sum is σ = 783063216. Its totient is φ = 587297400.

The previous prime is 685180297. The next prime is 685180333. The reversal of 685180307 is 703081586.

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 685180307 - 2¹⁴ = 685163923 is a prime.

It is a super-2 number, since 2×685180307² = 938944106201228498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685183307) 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, 48941444 + ... + 48941457.

It is an arithmetic number, because the mean of its divisors is an integer number (195765804).

Almost surely, 2^685180307 is an apocalyptic number.

685180307 is a deficient number, since it is larger than the sum of its proper divisors (97882909).

685180307 is an equidigital number, since it uses as much as digits as its factorization.

685180307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97882908.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 685180307 is about 26175.9490181349. The cubic root of 685180307 is about 881.5933199339.

The spelling of 685180307 in words is "six hundred eighty-five million, one hundred eighty thousand, three hundred seven".