989726814387 has 12 divisors (see below), whose sum is σ = 1466269605640. Its totient is φ = 659814429996.

The previous prime is 989726814383. The next prime is 989726814451. The reversal of 989726814387 is 783418627989.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

989726814387 is a `hidden beast` number, since 9 + 8 + 97 + 26 + 81 + 438 + 7 = 666.

It is not a de Polignac number, because 989726814387 - 2² = 989726814383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989726814383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5073664 + ... + 5265122.

Almost surely, 2^989726814387 is an apocalyptic number.

989726814387 is a deficient number, since it is larger than the sum of its proper divisors (476542791253).

989726814387 is an frugal number, since it uses more digits than its factorization.

989726814387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382927 (or 191462 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 72.

The spelling of 989726814387 in words is "nine hundred eighty-nine billion, seven hundred twenty-six million, eight hundred fourteen thousand, three hundred eighty-seven".