989031 has 4 divisors (see below), whose sum is σ = 1318712. Its totient is φ = 659352.

The previous prime is 989029. The next prime is 989059. The reversal of 989031 is 130989.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 989031 - 2¹ = 989029 is a prime.

It is a super-2 number, since 2×989031² = 1956364637922, which contains 22 as substring.

It is a D-number.

It is the 995-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 989031.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989031.

It is not an unprimeable number, because it can be changed into a prime (989011) by changing a digit.

It is a nontrivial repunit in base 994.

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 3 ways as a sum of consecutive naturals, for example, 164836 + ... + 164841.

It is an arithmetic number, because the mean of its divisors is an integer number (329678).

2⁹⁸⁹⁰³¹ is an apocalyptic number.

989031 is a deficient number, since it is larger than the sum of its proper divisors (329681).

989031 is a wasteful number, since it uses less digits than its factorization.

989031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329680.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 989031 is about 994.5003770738. The cubic root of 989031 is about 99.6330215825.

The spelling of 989031 in words is "nine hundred eighty-nine thousand, thirty-one".