811994 has 4 divisors (see below), whose sum is σ = 1217994. Its totient is φ = 405996.

The previous prime is 811991. The next prime is 811997. The reversal of 811994 is 499118.

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

It is an interprime number because it is at equal distance from previous prime (811991) and next prime (811997).

It can be written as a sum of positive squares in only one way, i.e., 714025 + 97969 = 845^2 + 313^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 811994.

It is not an unprimeable number, because it can be changed into a prime (811991) 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 as a sum of consecutive naturals, namely, 202997 + ... + 203000.

2⁸¹¹⁹⁹⁴ is an apocalyptic number.

811994 is a deficient number, since it is larger than the sum of its proper divisors (406000).

811994 is a wasteful number, since it uses less digits than its factorization.

811994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405999.

The product of its digits is 2592, while the sum is 32.

The square root of 811994 is about 901.1070968536. The cubic root of 811994 is about 93.2934041220.

The spelling of 811994 in words is "eight hundred eleven thousand, nine hundred ninety-four".