899109 has 6 divisors (see below), whose sum is σ = 1298726. Its totient is φ = 599400.

The previous prime is 899069. The next prime is 899123. The reversal of 899109 is 901998.

899109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 6084 = 945^2 + 78^2 .

It is not a de Polignac number, because 899109 - 2⁷ = 898981 is a prime.

It is a Duffinian number.

899109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49942 + ... + 49959.

2⁸⁹⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

899109 is a deficient number, since it is larger than the sum of its proper divisors (399617).

899109 is a wasteful number, since it uses less digits than its factorization.

899109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99907 (or 99904 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 899109 is about 948.2135835348. The cubic root of 899109 is about 96.5170667909.

The spelling of 899109 in words is "eight hundred ninety-nine thousand, one hundred nine".