989439 has 8 divisors (see below), whose sum is σ = 1439232. Its totient is φ = 599640.

The previous prime is 989423. The next prime is 989441. The reversal of 989439 is 934989.

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

It is not a de Polignac number, because 989439 - 2⁴ = 989423 is a prime.

It is an Ulam number.

989439 is a lucky number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 989439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989419) 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, 14959 + ... + 15024.

It is an arithmetic number, because the mean of its divisors is an integer number (179904).

2⁹⁸⁹⁴³⁹ is an apocalyptic number.

989439 is a deficient number, since it is larger than the sum of its proper divisors (449793).

989439 is a wasteful number, since it uses less digits than its factorization.

989439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29997.

The product of its digits is 69984, while the sum is 42.

The square root of 989439 is about 994.7054840504. The cubic root of 989439 is about 99.6467200693.

The spelling of 989439 in words is "nine hundred eighty-nine thousand, four hundred thirty-nine".