9991230202313 has 4 divisors (see below), whose sum is σ = 9994609045380. Its totient is φ = 9987851359248.

The previous prime is 9991230202241. The next prime is 9991230202321. The reversal of 9991230202313 is 3132020321999.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4183530255424 + 5807699946889 = 2045368^2 + 2409917^2 .

It is a cyclic number.

It is not a de Polignac number, because 9991230202313 - 2¹² = 9991230198217 is a prime.

It is a super-2 number, since 2×9991230202313² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991230202913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689417098 + ... + 1689423011.

It is an arithmetic number, because the mean of its divisors is an integer number (2498652261345).

Almost surely, 2^{9991230202313} is an apocalyptic number.

It is an amenable number.

9991230202313 is a deficient number, since it is larger than the sum of its proper divisors (3378843067).

9991230202313 is a wasteful number, since it uses less digits than its factorization.

9991230202313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378843066.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 9991230202313 in words is "nine trillion, nine hundred ninety-one billion, two hundred thirty million, two hundred two thousand, three hundred thirteen".