809949103 has 2 divisors, whose sum is σ = 809949104. Its totient is φ = 809949102.

The previous prime is 809949053. The next prime is 809949187. The reversal of 809949103 is 301949908.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809949103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 809949103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809979103) 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, 404974551 + 404974552.

It is an arithmetic number, because the mean of its divisors is an integer number (404974552).

Almost surely, 2^809949103 is an apocalyptic number.

809949103 is a deficient number, since it is larger than the sum of its proper divisors (1).

809949103 is an equidigital number, since it uses as much as digits as its factorization.

809949103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 809949103 is about 28459.6047583237. The cubic root of 809949103 is about 932.1502268324.

The spelling of 809949103 in words is "eight hundred nine million, nine hundred forty-nine thousand, one hundred three".