989843739 has 8 divisors (see below), whose sum is σ = 1321331520. Its totient is φ = 659125896.

The previous prime is 989843737. The next prime is 989843773. The reversal of 989843739 is 937348989.

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

It is not a de Polignac number, because 989843739 - 2¹ = 989843737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989843737) 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, 189477 + ... + 194630.

It is an arithmetic number, because the mean of its divisors is an integer number (165166440).

Almost surely, 2^989843739 is an apocalyptic number.

989843739 is a deficient number, since it is larger than the sum of its proper divisors (331487781).

989843739 is a wasteful number, since it uses less digits than its factorization.

989843739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384969.

The product of its digits is 11757312, while the sum is 60.

The square root of 989843739 is about 31461.7821968178. The cubic root of 989843739 is about 996.6030534871.

The spelling of 989843739 in words is "nine hundred eighty-nine million, eight hundred forty-three thousand, seven hundred thirty-nine".