989853691 has 12 divisors (see below), whose sum is σ = 1038600360. Its totient is φ = 943305440.

The previous prime is 989853677. The next prime is 989853701. The reversal of 989853691 is 196358989.

It is not a de Polignac number, because 989853691 - 2¹⁷ = 989722619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989853191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145320 + ... + 151978.

It is an arithmetic number, because the mean of its divisors is an integer number (86550030).

Almost surely, 2^989853691 is an apocalyptic number.

989853691 is a deficient number, since it is larger than the sum of its proper divisors (48746669).

989853691 is a wasteful number, since it uses less digits than its factorization.

989853691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986 (or 6963 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 58.

The square root of 989853691 is about 31461.9403565642. The cubic root of 989853691 is about 996.6063934622.

The spelling of 989853691 in words is "nine hundred eighty-nine million, eight hundred fifty-three thousand, six hundred ninety-one".