9998685747 has 12 divisors (see below), whose sum is σ = 14449869720. Its totient is φ = 6662410368.

The previous prime is 9998685733. The next prime is 9998685773. The reversal of 9998685747 is 7475868999.

It is not a de Polignac number, because 9998685747 - 2²⁶ = 9931576883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9998687747) 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, 262878 + ... + 298499.

It is an arithmetic number, because the mean of its divisors is an integer number (1204155810).

Almost surely, 2^9998685747 is an apocalyptic number.

9998685747 is a deficient number, since it is larger than the sum of its proper divisors (4451183973).

9998685747 is a wasteful number, since it uses less digits than its factorization.

9998685747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563362 (or 563359 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The square root of 9998685747 is about 99993.4285190782. The cubic root of 9998685747 is about 2154.3403034883.

The spelling of 9998685747 in words is "nine billion, nine hundred ninety-eight million, six hundred eighty-five thousand, seven hundred forty-seven".