8019811 has 4 divisors (see below), whose sum is σ = 8155800. Its totient is φ = 7883824.

The previous prime is 8019779. The next prime is 8019821. The reversal of 8019811 is 1189108.

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

It is a cyclic number.

It is not a de Polignac number, because 8019811 - 2⁵ = 8019779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8019811.

It is not an unprimeable number, because it can be changed into a prime (8019821) 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, 67906 + ... + 68023.

It is an arithmetic number, because the mean of its divisors is an integer number (2038950).

Almost surely, 2^8019811 is an apocalyptic number.

8019811 is a deficient number, since it is larger than the sum of its proper divisors (135989).

8019811 is a wasteful number, since it uses less digits than its factorization.

8019811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135988.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 8019811 is about 2831.9270823946. The cubic root of 8019811 is about 200.1649555775.

It can be divided in two parts, 80 and 19811, that added together give a palindrome (19891).

The spelling of 8019811 in words is "eight million, nineteen thousand, eight hundred eleven".