9981698199 has 16 divisors (see below), whose sum is σ = 14911236480. Its totient is φ = 5886012960.

The previous prime is 9981698197. The next prime is 9981698201. The reversal of 9981698199 is 9918961899.

It is an interprime number because it is at equal distance from previous prime (9981698197) and next prime (9981698201).

It is not a de Polignac number, because 9981698199 - 2¹ = 9981698197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981698191) 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, 4086289 + ... + 4088730.

It is an arithmetic number, because the mean of its divisors is an integer number (931952280).

Almost surely, 2^9981698199 is an apocalyptic number.

9981698199 is a deficient number, since it is larger than the sum of its proper divisors (4929538281).

9981698199 is a wasteful number, since it uses less digits than its factorization.

9981698199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175070.

The product of its digits is 22674816, while the sum is 69.

The square root of 9981698199 is about 99908.4490871518. The cubic root of 9981698199 is about 2153.1195528939.

The spelling of 9981698199 in words is "nine billion, nine hundred eighty-one million, six hundred ninety-eight thousand, one hundred ninety-nine".