685477 has 8 divisors (see below), whose sum is σ = 750176. Its totient is φ = 622512.

The previous prime is 685471. The next prime is 685493. The reversal of 685477 is 774586.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685477 is a prime.

It is a Duffinian number.

685477 is a lucky number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478 + ... + 1264.

It is an arithmetic number, because the mean of its divisors is an integer number (93772).

2⁶⁸⁵⁴⁷⁷ is an apocalyptic number.

685477 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

685477 is a deficient number, since it is larger than the sum of its proper divisors (64699).

685477 is a wasteful number, since it uses less digits than its factorization.

685477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867.

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

The square root of 685477 is about 827.9353839522. The cubic root of 685477 is about 88.1720549132.

The spelling of 685477 in words is "six hundred eighty-five thousand, four hundred seventy-seven".