999795983 has 2 divisors, whose sum is σ = 999795984. Its totient is φ = 999795982.

The previous prime is 999795961. The next prime is 999796009. The reversal of 999795983 is 389597999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999795983 - 2¹⁶ = 999730447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999795283) 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, 499897991 + 499897992.

It is an arithmetic number, because the mean of its divisors is an integer number (499897992).

Almost surely, 2^999795983 is an apocalyptic number.

999795983 is a deficient number, since it is larger than the sum of its proper divisors (1).

999795983 is an equidigital number, since it uses as much as digits as its factorization.

999795983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49601160, while the sum is 68.

The square root of 999795983 is about 31619.5506451309. The cubic root of 999795983 is about 999.9319897080.

The spelling of 999795983 in words is "nine hundred ninety-nine million, seven hundred ninety-five thousand, nine hundred eighty-three".