989705 has 8 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 785200.

The previous prime is 989687. The next prime is 989719. The reversal of 989705 is 507989.

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

It is not a de Polignac number, because 989705 - 2⁶ = 989641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101 + ... + 1410.

It is an arithmetic number, because the mean of its divisors is an integer number (149688).

2⁹⁸⁹⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

989705 is a deficient number, since it is larger than the sum of its proper divisors (207799).

989705 is a wasteful number, since it uses less digits than its factorization.

989705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 989705 is about 994.8391829839. The cubic root of 989705 is about 99.6556489177.

The spelling of 989705 in words is "nine hundred eighty-nine thousand, seven hundred five".