685047 has 8 divisors (see below), whose sum is σ = 996480. Its totient is φ = 415160.

The previous prime is 685039. The next prime is 685051. The reversal of 685047 is 740586.

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 not a de Polignac number, because 685047 - 2³ = 685039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10347 + ... + 10412.

It is an arithmetic number, because the mean of its divisors is an integer number (124560).

2⁶⁸⁵⁰⁴⁷ is an apocalyptic number.

685047 is a deficient number, since it is larger than the sum of its proper divisors (311433).

685047 is a wasteful number, since it uses less digits than its factorization.

685047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20773.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 685047 is about 827.6756611137. The cubic root of 685047 is about 88.1536142681.

It can be divided in two parts, 68 and 5047, that added together give a palindrome (5115).

The spelling of 685047 in words is "six hundred eighty-five thousand, forty-seven".