869685 has 16 divisors (see below), whose sum is σ = 1430016. Its totient is φ = 451008.

The previous prime is 869683. The next prime is 869689. The reversal of 869685 is 586968.

869685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 869685 - 2¹ = 869683 is a prime.

869685 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869685.

It is not an unprimeable number, because it can be changed into a prime (869683) 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, 229 + ... + 1338.

It is an arithmetic number, because the mean of its divisors is an integer number (89376).

2⁸⁶⁹⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

869685 is a deficient number, since it is larger than the sum of its proper divisors (560331).

869685 is a wasteful number, since it uses less digits than its factorization.

869685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its digits is 103680, while the sum is 42.

The square root of 869685 is about 932.5690322973. The cubic root of 869685 is about 95.4525041823.

The spelling of 869685 in words is "eight hundred sixty-nine thousand, six hundred eighty-five".