9799947918 has 32 divisors (see below), whose sum is σ = 21782409120. Its totient is φ = 3265937280.

The previous prime is 9799947811. The next prime is 9799947919. The reversal of 9799947918 is 8197499979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9799947919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268908 + ... + 303168.

It is an arithmetic number, because the mean of its divisors is an integer number (680700285).

Almost surely, 2^9799947918 is an apocalyptic number.

9799947918 is an abundant number, since it is smaller than the sum of its proper divisors (11982461202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9799947918 is a wasteful number, since it uses less digits than its factorization.

9799947918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39569 (or 39563 counting only the distinct ones).

The product of its digits is 92588832, while the sum is 72.

The square root of 9799947918 is about 98994.6863119430. The cubic root of 9799947918 is about 2139.9711701651.

The spelling of 9799947918 in words is "nine billion, seven hundred ninety-nine million, nine hundred forty-seven thousand, nine hundred eighteen".