989285979 has 8 divisors (see below), whose sum is σ = 1438961472. Its totient is φ = 599567240.

The previous prime is 989285971. The next prime is 989286031. The reversal of 989285979 is 979582989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989285979 - 2³ = 989285971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989285971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14989149 + ... + 14989214.

It is an arithmetic number, because the mean of its divisors is an integer number (179870184).

Almost surely, 2^989285979 is an apocalyptic number.

989285979 is a deficient number, since it is larger than the sum of its proper divisors (449675493).

989285979 is a wasteful number, since it uses less digits than its factorization.

989285979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29978377.

The product of its digits is 29393280, while the sum is 66.

The square root of 989285979 is about 31452.9168599671. The cubic root of 989285979 is about 996.4158287307.

The spelling of 989285979 in words is "nine hundred eighty-nine million, two hundred eighty-five thousand, nine hundred seventy-nine".