685774 has 8 divisors (see below), whose sum is σ = 1038960. Its totient is φ = 339456.

The previous prime is 685759. The next prime is 685781. The reversal of 685774 is 477586.

685774 = T₆₀ + T₆₁ + ... + T₁₆₂.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

685774 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459 + ... + 1870.

It is an arithmetic number, because the mean of its divisors is an integer number (129870).

2⁶⁸⁵⁷⁷⁴ is an apocalyptic number.

685774 is a deficient number, since it is larger than the sum of its proper divisors (353186).

685774 is a wasteful number, since it uses less digits than its factorization.

685774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434.

The product of its digits is 47040, while the sum is 37.

The square root of 685774 is about 828.1147263514. The cubic root of 685774 is about 88.1847873215.

The spelling of 685774 in words is "six hundred eighty-five thousand, seven hundred seventy-four".