891879 has 8 divisors (see below), whose sum is σ = 1251840. Its totient is φ = 563256.

The previous prime is 891859. The next prime is 891887. The reversal of 891879 is 978198.

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

It is not a de Polignac number, because 891879 - 2¹⁷ = 760807 is a prime.

It is a super-3 number, since 3×891879³ = 2128330503436633317, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 891879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891809) 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, 7767 + ... + 7880.

It is an arithmetic number, because the mean of its divisors is an integer number (156480).

2⁸⁹¹⁸⁷⁹ is an apocalyptic number.

891879 is a deficient number, since it is larger than the sum of its proper divisors (359961).

891879 is a wasteful number, since it uses less digits than its factorization.

891879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15669.

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

The square root of 891879 is about 944.3934561400. The cubic root of 891879 is about 96.2576628520.

It can be divided in two parts, 891 and 879, that added together give a triangular number (1770 = T₅₉).

The spelling of 891879 in words is "eight hundred ninety-one thousand, eight hundred seventy-nine".