9999900913 has 2 divisors, whose sum is σ = 9999900914. Its totient is φ = 9999900912.

The previous prime is 9999900791. The next prime is 9999900947. The reversal of 9999900913 is 3190099999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9712496704 + 287404209 = 98552^2 + 16953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999900913 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999900413) 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, 4999950456 + 4999950457.

It is an arithmetic number, because the mean of its divisors is an integer number (4999950457).

Almost surely, 2^9999900913 is an apocalyptic number.

It is an amenable number.

9999900913 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999900913 is an equidigital number, since it uses as much as digits as its factorization.

9999900913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1594323, while the sum is 58.

The square root of 9999900913 is about 99999.5045637727. The cubic root of 9999900913 is about 2154.4275741260.

The spelling of 9999900913 in words is "nine billion, nine hundred ninety-nine million, nine hundred thousand, nine hundred thirteen".