989894983 has 16 divisors (see below), whose sum is σ = 1238768640. Its totient is φ = 768463200.

The previous prime is 989894981. The next prime is 989894987. The reversal of 989894983 is 389498989.

It is a cyclic number.

It is not a de Polignac number, because 989894983 - 2¹ = 989894981 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989894981) 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 15 ways as a sum of consecutive naturals, for example, 3183 + ... + 44608.

It is an arithmetic number, because the mean of its divisors is an integer number (77423040).

Almost surely, 2^989894983 is an apocalyptic number.

989894983 is a deficient number, since it is larger than the sum of its proper divisors (248873657).

989894983 is a wasteful number, since it uses less digits than its factorization.

989894983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48078.

The product of its digits is 40310784, while the sum is 67.

The square root of 989894983 is about 31462.5965711668. The cubic root of 989894983 is about 996.6202511664.

The spelling of 989894983 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, nine hundred eighty-three".