989906 has 8 divisors (see below), whose sum is σ = 1493964. Its totient is φ = 491920.

The previous prime is 989887. The next prime is 989909. The reversal of 989906 is 609989.

It can be written as a sum of positive squares in 2 ways, for example, as 919681 + 70225 = 959^2 + 265^2 .

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

It is not an unprimeable number, because it can be changed into a prime (989909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1085 + ... + 1776.

2⁹⁸⁹⁹⁰⁶ is an apocalyptic number.

989906 is a deficient number, since it is larger than the sum of its proper divisors (504058).

989906 is a wasteful number, since it uses less digits than its factorization.

989906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 989906 is about 994.9401992080. The cubic root of 989906 is about 99.6623948436.

The spelling of 989906 in words is "nine hundred eighty-nine thousand, nine hundred six".