989919 has 24 divisors (see below), whose sum is σ = 1722240. Its totient is φ = 535248.

The previous prime is 989917. The next prime is 989921. The reversal of 989919 is 919989.

It is an interprime number because it is at equal distance from previous prime (989917) and next prime (989921).

It is not a de Polignac number, because 989919 - 2¹ = 989917 is a prime.

It is a super-2 number, since 2×989919² = 1959879253122, which contains 22 as substring.

It is a congruent number.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 784 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (71760).

2⁹⁸⁹⁹¹⁹ is an apocalyptic number.

989919 is a deficient number, since it is larger than the sum of its proper divisors (732321).

989919 is a wasteful number, since it uses less digits than its factorization.

989919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 856 counting only the distinct ones).

The product of its digits is 52488, while the sum is 45.

The square root of 989919 is about 994.9467322425. The cubic root of 989919 is about 99.6628311158.

The spelling of 989919 in words is "nine hundred eighty-nine thousand, nine hundred nineteen".