989397143 has 8 divisors (see below), whose sum is σ = 1135472640. Its totient is φ = 844504920.

The previous prime is 989397139. The next prime is 989397169. The reversal of 989397143 is 341793989.

It is a happy number.

989397143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 989397143 - 2² = 989397139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989397103) 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, 294023 + ... + 297368.

It is an arithmetic number, because the mean of its divisors is an integer number (141934080).

Almost surely, 2^989397143 is an apocalyptic number.

989397143 is a deficient number, since it is larger than the sum of its proper divisors (146075497).

989397143 is a wasteful number, since it uses less digits than its factorization.

989397143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591637.

The product of its digits is 1469664, while the sum is 53.

The square root of 989397143 is about 31454.6839596267. The cubic root of 989397143 is about 996.4531490550.

The spelling of 989397143 in words is "nine hundred eighty-nine million, three hundred ninety-seven thousand, one hundred forty-three".