809874941 has 2 divisors, whose sum is σ = 809874942. Its totient is φ = 809874940.

The previous prime is 809874931. The next prime is 809874971. The reversal of 809874941 is 149478908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 468549316 + 341325625 = 21646^2 + 18475^2 .

It is a cyclic number.

It is not a de Polignac number, because 809874941 - 2¹⁴ = 809858557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 809874941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809874931) 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, 404937470 + 404937471.

It is an arithmetic number, because the mean of its divisors is an integer number (404937471).

Almost surely, 2^809874941 is an apocalyptic number.

It is an amenable number.

809874941 is a deficient number, since it is larger than the sum of its proper divisors (1).

809874941 is an equidigital number, since it uses as much as digits as its factorization.

809874941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 809874941 is about 28458.3017940284. The cubic root of 809874941 is about 932.1217755651.

The spelling of 809874941 in words is "eight hundred nine million, eight hundred seventy-four thousand, nine hundred forty-one".