9999313238 has 4 divisors (see below), whose sum is σ = 14998969860. Its totient is φ = 4999656618.

The previous prime is 9999313237. The next prime is 9999313243. The reversal of 9999313238 is 8323139999.

It is a semiprime because it is the product of two primes.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499828308 + ... + 2499828311.

It is an arithmetic number, because the mean of its divisors is an integer number (3749742465).

Almost surely, 2^9999313238 is an apocalyptic number.

9999313238 is a deficient number, since it is larger than the sum of its proper divisors (4999656622).

9999313238 is a wasteful number, since it uses less digits than its factorization.

9999313238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999656621.

The product of its digits is 2834352, while the sum is 56.

The square root of 9999313238 is about 99996.5661310427. The cubic root of 9999313238 is about 2154.3853694403.

The spelling of 9999313238 in words is "nine billion, nine hundred ninety-nine million, three hundred thirteen thousand, two hundred thirty-eight".