985879 has 4 divisors (see below), whose sum is σ = 992560. Its totient is φ = 979200.

The previous prime is 985877. The next prime is 985903. The reversal of 985879 is 978589.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978589 = 101 ⋅9689.

It is a cyclic number.

It is not a de Polignac number, because 985879 - 2¹ = 985877 is a prime.

It is an Ulam number.

It is a Duffinian number.

985879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114 + ... + 3415.

It is an arithmetic number, because the mean of its divisors is an integer number (248140).

2⁹⁸⁵⁸⁷⁹ is an apocalyptic number.

985879 is a deficient number, since it is larger than the sum of its proper divisors (6681).

985879 is a wasteful number, since it uses less digits than its factorization.

985879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its digits is 181440, while the sum is 46.

The square root of 985879 is about 992.9143971159. The cubic root of 985879 is about 99.5270668685.

It can be divided in two parts, 98587 and 9, that added together give a square (98596 = 314²).

The spelling of 985879 in words is "nine hundred eighty-five thousand, eight hundred seventy-nine".