989079 has 16 divisors (see below), whose sum is σ = 1623552. Its totient is φ = 521568.

The previous prime is 989071. The next prime is 989081. The reversal of 989079 is 970989.

It is a happy number.

It is not a de Polignac number, because 989079 - 2³ = 989071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (101472).

2⁹⁸⁹⁰⁷⁹ is an apocalyptic number.

989079 is a deficient number, since it is larger than the sum of its proper divisors (634473).

989079 is a wasteful number, since it uses less digits than its factorization.

989079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 989079 is about 994.5245095019. The cubic root of 989079 is about 99.6346333647.

Adding to 989079 its sum of digits (42), we get a triangular number (989121 = T₁₄₀₆).

The spelling of 989079 in words is "nine hundred eighty-nine thousand, seventy-nine".