685751875 has 10 divisors (see below), whose sum is σ = 856916324. Its totient is φ = 548601000.

The previous prime is 685751861. The next prime is 685751881. The reversal of 685751875 is 578157586.

It is a happy number.

It is not a de Polignac number, because 685751875 - 2²¹ = 683654723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 547977 + ... + 549226.

Almost surely, 2^685751875 is an apocalyptic number.

685751875 is a deficient number, since it is larger than the sum of its proper divisors (171164449).

685751875 is an equidigital number, since it uses as much as digits as its factorization.

685751875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097223 (or 1097208 counting only the distinct ones).

The product of its digits is 2352000, while the sum is 52.

The square root of 685751875 is about 26186.8645507628. The cubic root of 685751875 is about 881.8383894811.

The spelling of 685751875 in words is "six hundred eighty-five million, seven hundred fifty-one thousand, eight hundred seventy-five".