899871 has 16 divisors (see below), whose sum is σ = 1392384. Its totient is φ = 506304.

The previous prime is 899863. The next prime is 899881. The reversal of 899871 is 178998.

It is not a de Polignac number, because 899871 - 2³ = 899863 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899831) 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, 1240 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (87024).

2⁸⁹⁹⁸⁷¹ is an apocalyptic number.

899871 is a deficient number, since it is larger than the sum of its proper divisors (492513).

899871 is a wasteful number, since it uses less digits than its factorization.

899871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670.

The product of its digits is 36288, while the sum is 42.

The square root of 899871 is about 948.6153066444. The cubic root of 899871 is about 96.5443253464.

It can be divided in two parts, 899 and 871, that added together give a triangular number (1770 = T₅₉).

The spelling of 899871 in words is "eight hundred ninety-nine thousand, eight hundred seventy-one".