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9999988813 is a prime number
BaseRepresentation
bin10010101000000101…
…11011100001001101
3221210220202001210001
421110002323201031
5130434444120223
64332142244301
7502544334223
oct112402734115
927726661701
109999988813
114271807671
121b30b86691
13c349b5359
146ac15cb13
153d7da99ad
hex2540bb84d

9999988813 has 2 divisors, whose sum is σ = 9999988814. Its totient is φ = 9999988812.

The previous prime is 9999988811. The next prime is 9999988841. The reversal of 9999988813 is 3188899999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8881554564 + 1118434249 = 94242^2 + 33443^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999988813 - 21 = 9999988811 is a prime.

Together with 9999988811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999988811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999994406 + 4999994407.

It is an arithmetic number, because the mean of its divisors is an integer number (4999994407).

Almost surely, 29999988813 is an apocalyptic number.

It is an amenable number.

9999988813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999988813 is an equidigital number, since it uses as much as digits as its factorization.

9999988813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90699264, while the sum is 73.

The square root of 9999988813 is about 99999.9440649844. The cubic root of 9999988813 is about 2154.4338866429.

The spelling of 9999988813 in words is "nine billion, nine hundred ninety-nine million, nine hundred eighty-eight thousand, eight hundred thirteen".