989709447 has 16 divisors (see below), whose sum is σ = 1334092032. Its totient is φ = 652586880.

The previous prime is 989709433. The next prime is 989709463. The reversal of 989709447 is 744907989.

It is not a de Polignac number, because 989709447 - 2¹¹ = 989707399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989709467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231247 + ... + 235487.

It is an arithmetic number, because the mean of its divisors is an integer number (83380752).

Almost surely, 2^989709447 is an apocalyptic number.

989709447 is a deficient number, since it is larger than the sum of its proper divisors (344382585).

989709447 is a wasteful number, since it uses less digits than its factorization.

989709447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 989709447 is about 31459.6479160209. The cubic root of 989709447 is about 996.5579817703.

The spelling of 989709447 in words is "nine hundred eighty-nine million, seven hundred nine thousand, four hundred forty-seven".