809943146 has 16 divisors (see below), whose sum is σ = 1260441000. Its totient is φ = 389876928.

The previous prime is 809943097. The next prime is 809943149. The reversal of 809943146 is 641349908.

It can be written as a sum of positive squares in 4 ways, for example, as 741963121 + 67980025 = 27239^2 + 8245^2 .

It is a junction number, because it is equal to n+sod(n) for n = 809943097 and 809943106.

It is not an unprimeable number, because it can be changed into a prime (809943149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236 + ... + 40248.

Almost surely, 2^809943146 is an apocalyptic number.

809943146 is a deficient number, since it is larger than the sum of its proper divisors (450497854).

809943146 is a wasteful number, since it uses less digits than its factorization.

809943146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40393.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 809943146 is about 28459.5001010207. The cubic root of 809943146 is about 932.1479415725.

The spelling of 809943146 in words is "eight hundred nine million, nine hundred forty-three thousand, one hundred forty-six".