994707809 has 2 divisors, whose sum is σ = 994707810. Its totient is φ = 994707808.

The previous prime is 994707803. The next prime is 994707823. The reversal of 994707809 is 908707499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 582739600 + 411968209 = 24140^2 + 20297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994707809 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (994707803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497353904 + 497353905.

It is an arithmetic number, because the mean of its divisors is an integer number (497353905).

Almost surely, 2^994707809 is an apocalyptic number.

It is an amenable number.

994707809 is a deficient number, since it is larger than the sum of its proper divisors (1).

994707809 is an equidigital number, since it uses as much as digits as its factorization.

994707809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 994707809 is about 31538.9887123858. The cubic root of 994707809 is about 998.2328152309.

The spelling of 994707809 in words is "nine hundred ninety-four million, seven hundred seven thousand, eight hundred nine".