984989 has 8 divisors (see below), whose sum is σ = 1015872. Its totient is φ = 954720.

The previous prime is 984959. The next prime is 985003. The reversal of 984989 is 989489.

984989 = 572² + 573² + 574².

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

It is a cyclic number.

It is not a de Polignac number, because 984989 - 2⁸ = 984733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (984959) 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, 7454 + ... + 7584.

It is an arithmetic number, because the mean of its divisors is an integer number (126984).

2⁹⁸⁴⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

984989 is a deficient number, since it is larger than the sum of its proper divisors (30883).

984989 is a wasteful number, since it uses less digits than its factorization.

984989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307.

The product of its digits is 186624, while the sum is 47.

The square root of 984989 is about 992.4661203285. The cubic root of 984989 is about 99.4971085748.

The spelling of 984989 in words is "nine hundred eighty-four thousand, nine hundred eighty-nine".