989915 has 8 divisors (see below), whose sum is σ = 1229040. Its totient is φ = 764512.

The previous prime is 989909. The next prime is 989917. The reversal of 989915 is 519989.

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 989915 - 2¹² = 985819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989917) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3269 + ... + 3558.

It is an arithmetic number, because the mean of its divisors is an integer number (153630).

2⁹⁸⁹⁹¹⁵ is an apocalyptic number.

989915 is a deficient number, since it is larger than the sum of its proper divisors (239125).

989915 is a wasteful number, since it uses less digits than its factorization.

989915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861.

The product of its digits is 29160, while the sum is 41.

The square root of 989915 is about 994.9447220826. The cubic root of 989915 is about 99.6626968786.

The spelling of 989915 in words is "nine hundred eighty-nine thousand, nine hundred fifteen".