989702639 has 8 divisors (see below), whose sum is σ = 1007370000. Its totient is φ = 972065152.

The previous prime is 989702591. The next prime is 989702653. The reversal of 989702639 is 936207989.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989702639 is a prime.

It is a super-2 number, since 2×989702639² = 1959022627287128642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989702839) 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, 65687 + ... + 79335.

It is an arithmetic number, because the mean of its divisors is an integer number (125921250).

Almost surely, 2^989702639 is an apocalyptic number.

989702639 is a deficient number, since it is larger than the sum of its proper divisors (17667361).

989702639 is a wasteful number, since it uses less digits than its factorization.

989702639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14937.

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

The square root of 989702639 is about 31459.5397137339. The cubic root of 989702639 is about 996.5556967285. Note that the first 3 decimals are identical.

The spelling of 989702639 in words is "nine hundred eighty-nine million, seven hundred two thousand, six hundred thirty-nine".