811996 has 6 divisors (see below), whose sum is σ = 1421000. Its totient is φ = 405996.

The previous prime is 811991. The next prime is 811997. The reversal of 811996 is 699118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811991) by changing a digit.

811996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 101496 + ... + 101503.

2⁸¹¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

811996 is a deficient number, since it is larger than the sum of its proper divisors (609004).

811996 is a wasteful number, since it uses less digits than its factorization.

811996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203003 (or 203001 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 811996 is about 901.1082065990. The cubic root of 811996 is about 93.2934807181.

The spelling of 811996 in words is "eight hundred eleven thousand, nine hundred ninety-six".