9999761311 has 2 divisors, whose sum is σ = 9999761312. Its totient is φ = 9999761310.

The previous prime is 9999761309. The next prime is 9999761333. The reversal of 9999761311 is 1131679999.

9999761311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1131679999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999761311 - 2¹ = 9999761309 is a prime.

Together with 9999761309, 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 (9999761371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999880655 + 4999880656.

It is an arithmetic number, because the mean of its divisors is an integer number (4999880656).

Almost surely, 2^9999761311 is an apocalyptic number.

9999761311 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999761311 is an equidigital number, since it uses as much as digits as its factorization.

9999761311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 826686, while the sum is 55.

The square root of 9999761311 is about 99998.8065478784. The cubic root of 9999761311 is about 2154.4175485668.

The spelling of 9999761311 in words is "nine billion, nine hundred ninety-nine million, seven hundred sixty-one thousand, three hundred eleven".