9999998311 has 2 divisors, whose sum is σ = 9999998312. Its totient is φ = 9999998310.

The previous prime is 9999998273. The next prime is 9999998317. The reversal of 9999998311 is 1138999999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9999998311 - 2³³ = 1410063719 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999998317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999999155 + 4999999156.

It is an arithmetic number, because the mean of its divisors is an integer number (4999999156).

Almost surely, 2^9999998311 is an apocalyptic number.

9999998311 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999998311 is an equidigital number, since it uses as much as digits as its factorization.

9999998311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12754584, while the sum is 67.

The square root of 9999998311 is about 99999.9915549996. The cubic root of 9999998311 is about 2154.4345687372.

The spelling of 9999998311 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, three hundred eleven".