809727994 has 8 divisors (see below), whose sum is σ = 1216751040. Its totient is φ = 404144316.

The previous prime is 809727953. The next prime is 809728021. The reversal of 809727994 is 499727908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 358434 + ... + 360685.

It is an arithmetic number, because the mean of its divisors is an integer number (152093880).

Almost surely, 2^809727994 is an apocalyptic number.

809727994 is a deficient number, since it is larger than the sum of its proper divisors (407023046).

809727994 is a wasteful number, since it uses less digits than its factorization.

809727994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719684.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 809727994 is about 28455.7198819499. The cubic root of 809727994 is about 932.0653961676.

The spelling of 809727994 in words is "eight hundred nine million, seven hundred twenty-seven thousand, nine hundred ninety-four".