899859 has 8 divisors (see below), whose sum is σ = 1263040. Its totient is φ = 568296.

The previous prime is 899851. The next prime is 899863. The reversal of 899859 is 958998.

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

It is not a de Polignac number, because 899859 - 2³ = 899851 is a prime.

It is a Duffinian number.

899859 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (899851) 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, 7837 + ... + 7950.

It is an arithmetic number, because the mean of its divisors is an integer number (157880).

2⁸⁹⁹⁸⁵⁹ is an apocalyptic number.

899859 is a deficient number, since it is larger than the sum of its proper divisors (363181).

899859 is a wasteful number, since it uses less digits than its factorization.

899859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15809.

The product of its digits is 233280, while the sum is 48.

The square root of 899859 is about 948.6089816147. The cubic root of 899859 is about 96.5438961971.

Subtracting from 899859 its sum of digits (48), we obtain a triangular number (899811 = T₁₃₄₁).

The spelling of 899859 in words is "eight hundred ninety-nine thousand, eight hundred fifty-nine".