994803209 has 2 divisors, whose sum is σ = 994803210. Its totient is φ = 994803208.

The previous prime is 994803091. The next prime is 994803217. The reversal of 994803209 is 902308499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832495609 + 162307600 = 28853^2 + 12740^2 .

It is a cyclic number.

It is not a de Polignac number, because 994803209 - 2¹⁶ = 994737673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 994803209.

It is not a weakly prime, because it can be changed into another prime (994803239) 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, 497401604 + 497401605.

It is an arithmetic number, because the mean of its divisors is an integer number (497401605).

Almost surely, 2^994803209 is an apocalyptic number.

It is an amenable number.

994803209 is a deficient number, since it is larger than the sum of its proper divisors (1).

994803209 is an equidigital number, since it uses as much as digits as its factorization.

994803209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 994803209 is about 31540.5010898686. The cubic root of 994803209 is about 998.2647269023.

The spelling of 994803209 in words is "nine hundred ninety-four million, eight hundred three thousand, two hundred nine".