809194 has 4 divisors (see below), whose sum is σ = 1213794. Its totient is φ = 404596.

The previous prime is 809189. The next prime is 809201. The reversal of 809194 is 491908.

809194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 660969 + 148225 = 813^2 + 385^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202297 + ... + 202300.

2⁸⁰⁹¹⁹⁴ is an apocalyptic number.

809194 is a deficient number, since it is larger than the sum of its proper divisors (404600).

809194 is a wasteful number, since it uses less digits than its factorization.

809194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404599.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 809194 is about 899.5521107751. The cubic root of 809194 is about 93.1860460361.

The spelling of 809194 in words is "eight hundred nine thousand, one hundred ninety-four".