685837874 has 32 divisors (see below), whose sum is σ = 1109649024. Its totient is φ = 317116800.

The previous prime is 685837871. The next prime is 685837877. The reversal of 685837874 is 478738586.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (685837871) and next prime (685837877).

It is not an unprimeable number, because it can be changed into a prime (685837871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198062 + ... + 201494.

It is an arithmetic number, because the mean of its divisors is an integer number (34676532).

Almost surely, 2^685837874 is an apocalyptic number.

685837874 is a deficient number, since it is larger than the sum of its proper divisors (423811150).

685837874 is a wasteful number, since it uses less digits than its factorization.

685837874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602.

The product of its digits is 9031680, while the sum is 56.

The square root of 685837874 is about 26188.5065248097. The cubic root of 685837874 is about 881.8752512346.

The spelling of 685837874 in words is "six hundred eighty-five million, eight hundred thirty-seven thousand, eight hundred seventy-four".