999849811 has 2 divisors, whose sum is σ = 999849812. Its totient is φ = 999849810.

The previous prime is 999849689. The next prime is 999849827. The reversal of 999849811 is 118948999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999849811 - 2⁹ = 999849299 is a prime.

It is not a weakly prime, because it can be changed into another prime (999849871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499924905 + 499924906.

It is an arithmetic number, because the mean of its divisors is an integer number (499924906).

Almost surely, 2^999849811 is an apocalyptic number.

999849811 is a deficient number, since it is larger than the sum of its proper divisors (1).

999849811 is an equidigital number, since it uses as much as digits as its factorization.

999849811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 58.

The square root of 999849811 is about 31620.4018159163. The cubic root of 999849811 is about 999.9499344935.

The spelling of 999849811 in words is "nine hundred ninety-nine million, eight hundred forty-nine thousand, eight hundred eleven".