808221829 has 4 divisors (see below), whose sum is σ = 850759840. Its totient is φ = 765683820.

The previous prime is 808221797. The next prime is 808221833. The reversal of 808221829 is 928122808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 808221829 - 2⁵ = 808221797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 808221791 and 808221800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808221839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21268977 + ... + 21269014.

It is an arithmetic number, because the mean of its divisors is an integer number (212689960).

Almost surely, 2^808221829 is an apocalyptic number.

It is an amenable number.

808221829 is a deficient number, since it is larger than the sum of its proper divisors (42538011).

808221829 is a wasteful number, since it uses less digits than its factorization.

808221829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42538010.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 808221829 is about 28429.2424978226. The cubic root of 808221829 is about 931.4871297157.

The spelling of 808221829 in words is "eight hundred eight million, two hundred twenty-one thousand, eight hundred twenty-nine".