809969994 has 12 divisors (see below), whose sum is σ = 1754935026. Its totient is φ = 269989992.

The previous prime is 809969989. The next prime is 809970011. The reversal of 809969994 is 499969908.

It can be written as a sum of positive squares in only one way, i.e., 685758969 + 124211025 = 26187^2 + 11145^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22499149 + ... + 22499184.

Almost surely, 2^809969994 is an apocalyptic number.

809969994 is an abundant number, since it is smaller than the sum of its proper divisors (944965032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

809969994 is a wasteful number, since it uses less digits than its factorization.

809969994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44998341 (or 44998338 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 63.

The square root of 809969994 is about 28459.9717849474. The cubic root of 809969994 is about 932.1582410738.

The spelling of 809969994 in words is "eight hundred nine million, nine hundred sixty-nine thousand, nine hundred ninety-four".