9999313236 has 144 divisors (see below), whose sum is σ = 29078300160. Its totient is φ = 2865360960.

The previous prime is 9999313231. The next prime is 9999313237. The reversal of 9999313236 is 6323139999.

It is a happy number.

9999313236 is a `hidden beast` number, since 9 + 9 + 99 + 313 + 236 = 666.

9999313236 is a nontrivial binomial coefficient, being equal to C(141417, 2).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999313231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6221545 + ... + 6223151.

It is an arithmetic number, because the mean of its divisors is an integer number (201932640).

Almost surely, 2^9999313236 is an apocalyptic number.

9999313236 is the 141416-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999313236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14539150080).

9999313236 is an abundant number, since it is smaller than the sum of its proper divisors (19078986924).

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

9999313236 is a wasteful number, since it uses less digits than its factorization.

9999313236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2469 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 54.

The square root of 9999313236 is about 99996.5661210424. The cubic root of 9999313236 is about 2154.3853692966.

The spelling of 9999313236 in words is "nine billion, nine hundred ninety-nine million, three hundred thirteen thousand, two hundred thirty-six".