899685 has 12 divisors (see below), whose sum is σ = 1559532. Its totient is φ = 479808.

The previous prime is 899681. The next prime is 899687. The reversal of 899685 is 586998.

It can be written as a sum of positive squares in 2 ways, for example, as 427716 + 471969 = 654^2 + 687^2 .

It is not a de Polignac number, because 899685 - 2² = 899681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 19993 = 899685 / (8 + 9 + 9 + 6 + 8 + 5).

899685 is a lucky number.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 899685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899681) 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, 9952 + ... + 10041.

It is an arithmetic number, because the mean of its divisors is an integer number (129961).

2⁸⁹⁹⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

899685 is a deficient number, since it is larger than the sum of its proper divisors (659847).

899685 is a wasteful number, since it uses less digits than its factorization.

899685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20004 (or 20001 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 899685 is about 948.5172639441. The cubic root of 899685 is about 96.5376731033.

The spelling of 899685 in words is "eight hundred ninety-nine thousand, six hundred eighty-five".