999966311 has 2 divisors, whose sum is σ = 999966312. Its totient is φ = 999966310.

The previous prime is 999966293. The next prime is 999966323. The reversal of 999966311 is 113669999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999966311 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 (999906311) 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, 499983155 + 499983156.

It is an arithmetic number, because the mean of its divisors is an integer number (499983156).

Almost surely, 2^999966311 is an apocalyptic number.

999966311 is a deficient number, since it is larger than the sum of its proper divisors (1).

999966311 is an equidigital number, since it uses as much as digits as its factorization.

999966311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 708588, while the sum is 53.

The square root of 999966311 is about 31622.2439273370. The cubic root of 999966311 is about 999.9887702072.

The spelling of 999966311 in words is "nine hundred ninety-nine million, nine hundred sixty-six thousand, three hundred eleven".