811011 has 4 divisors (see below), whose sum is σ = 1081352. Its totient is φ = 540672.

The previous prime is 810989. The next prime is 811037. The reversal of 811011 is 110118.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-811011 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (811081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135166 + ... + 135171.

It is an arithmetic number, because the mean of its divisors is an integer number (270338).

2⁸¹¹⁰¹¹ is an apocalyptic number.

811011 is a deficient number, since it is larger than the sum of its proper divisors (270341).

811011 is a wasteful number, since it uses less digits than its factorization.

811011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270340.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 811011 is about 900.5614915152. The cubic root of 811011 is about 93.2557419192.

Adding to 811011 its reverse (110118), we get a palindrome (921129).

It can be divided in two parts, 8 and 11011, that multiplied together give a palindrome (88088).

The spelling of 811011 in words is "eight hundred eleven thousand, eleven".