685172675 has 48 divisors (see below), whose sum is σ = 990820512. Its totient is φ = 464486400.

The previous prime is 685172669. The next prime is 685172687. The reversal of 685172675 is 576271586.

It is not a de Polignac number, because 685172675 - 2⁶ = 685172611 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 527627 + ... + 528923.

It is an arithmetic number, because the mean of its divisors is an integer number (20642094).

Almost surely, 2^685172675 is an apocalyptic number.

685172675 is a deficient number, since it is larger than the sum of its proper divisors (305647837).

685172675 is a wasteful number, since it uses less digits than its factorization.

685172675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448 (or 1443 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 685172675 is about 26175.8032350490. The cubic root of 685172675 is about 881.5900466616.

The spelling of 685172675 in words is "six hundred eighty-five million, one hundred seventy-two thousand, six hundred seventy-five".