989715199 has 4 divisors (see below), whose sum is σ = 1079689320. Its totient is φ = 899741080.

The previous prime is 989715173. The next prime is 989715217. The reversal of 989715199 is 991517989.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989715199 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 (989715169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44987044 + ... + 44987065.

It is an arithmetic number, because the mean of its divisors is an integer number (269922330).

Almost surely, 2^989715199 is an apocalyptic number.

989715199 is a deficient number, since it is larger than the sum of its proper divisors (89974121).

989715199 is a wasteful number, since it uses less digits than its factorization.

989715199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89974120.

The product of its digits is 1837080, while the sum is 58.

The square root of 989715199 is about 31459.7393345844. The cubic root of 989715199 is about 996.5599123673.

The spelling of 989715199 in words is "nine hundred eighty-nine million, seven hundred fifteen thousand, one hundred ninety-nine".