9929686998 has 64 divisors (see below), whose sum is σ = 24917626368. Its totient is φ = 2562693120.

The previous prime is 9929686997. The next prime is 9929686999. The reversal of 9929686998 is 8996869299.

It is an interprime number because it is at equal distance from previous prime (9929686997) and next prime (9929686999).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9929686993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4086 + ... + 140982.

It is an arithmetic number, because the mean of its divisors is an integer number (389337912).

Almost surely, 2^9929686998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9929686998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12458813184).

9929686998 is an abundant number, since it is smaller than the sum of its proper divisors (14987939370).

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

9929686998 is a wasteful number, since it uses less digits than its factorization.

9929686998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137077.

The product of its digits is 272097792, while the sum is 75.

The square root of 9929686998 is about 99647.8148179879. The cubic root of 9929686998 is about 2149.3733163961.

The spelling of 9929686998 in words is "nine billion, nine hundred twenty-nine million, six hundred eighty-six thousand, nine hundred ninety-eight".