989716975 has 12 divisors (see below), whose sum is σ = 1321653256. Its totient is φ = 730867680.

The previous prime is 989716919. The next prime is 989717041. The reversal of 989716975 is 579617989.

It is not a de Polignac number, because 989716975 - 2⁹ = 989716463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1522317 + ... + 1522966.

Almost surely, 2^989716975 is an apocalyptic number.

989716975 is a deficient number, since it is larger than the sum of its proper divisors (331936281).

989716975 is a wasteful number, since it uses less digits than its factorization.

989716975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045306 (or 3045301 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 61.

The square root of 989716975 is about 31459.7675611248. The cubic root of 989716975 is about 996.5605084611.

The spelling of 989716975 in words is "nine hundred eighty-nine million, seven hundred sixteen thousand, nine hundred seventy-five".