685629 has 12 divisors (see below), whose sum is σ = 1131936. Its totient is φ = 391752.

The previous prime is 685621. The next prime is 685631. The reversal of 685629 is 926586.

It is not a de Polignac number, because 685629 - 2³ = 685621 is a prime.

It is a Curzon number.

685629 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 685593 and 685602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5379 + ... + 5504.

It is an arithmetic number, because the mean of its divisors is an integer number (94328).

2⁶⁸⁵⁶²⁹ is an apocalyptic number.

It is an amenable number.

685629 is a deficient number, since it is larger than the sum of its proper divisors (446307).

685629 is a wasteful number, since it uses less digits than its factorization.

685629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10896 (or 10893 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 685629 is about 828.0271734672. The cubic root of 685629 is about 88.1785716219.

The spelling of 685629 in words is "six hundred eighty-five thousand, six hundred twenty-nine".