8205819 has 8 divisors (see below), whose sum is σ = 11195712. Its totient is φ = 5343240.

The previous prime is 8205817. The next prime is 8205829. The reversal of 8205819 is 9185028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8205819 - 2¹ = 8205817 is a prime.

It is a super-2 number, since 2×8205819² = 134670930921522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8205819.

It is not an unprimeable number, because it can be changed into a prime (8205817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31677 + ... + 31934.

It is an arithmetic number, because the mean of its divisors is an integer number (1399464).

Almost surely, 2^8205819 is an apocalyptic number.

8205819 is a deficient number, since it is larger than the sum of its proper divisors (2989893).

8205819 is a wasteful number, since it uses less digits than its factorization.

8205819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63657.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 8205819 is about 2864.5800739375. The cubic root of 8205819 is about 201.7006561869.

The spelling of 8205819 in words is "eight million, two hundred five thousand, eight hundred nineteen".