819994 has 16 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 341712.

The previous prime is 819991. The next prime is 820037. The reversal of 819994 is 499918.

It is not an unprimeable number, because it can be changed into a prime (819991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (90288).

2⁸¹⁹⁹⁹⁴ is an apocalyptic number.

819994 is a deficient number, since it is larger than the sum of its proper divisors (624614).

819994 is a wasteful number, since it uses less digits than its factorization.

819994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 23328, while the sum is 40.

The square root of 819994 is about 905.5352008619. The cubic root of 819994 is about 93.5987879406.

It can be divided in two parts, 8 and 19994, that added together give a palindrome (20002).

The spelling of 819994 in words is "eight hundred nineteen thousand, nine hundred ninety-four".