8192821 has 8 divisors (see below), whose sum is σ = 10083584. Its totient is φ = 6482160.

The previous prime is 8192813. The next prime is 8192837. The reversal of 8192821 is 1282918.

It is a happy number.

8192821 is digitally balanced in base 3 and base 8, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 8192821 - 2³ = 8192813 is a prime.

8192821 is strictly pandigital in base 8.

8192821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8192881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44925 + ... + 45106.

It is an arithmetic number, because the mean of its divisors is an integer number (1260448).

Almost surely, 2^8192821 is an apocalyptic number.

It is an amenable number.

8192821 is a deficient number, since it is larger than the sum of its proper divisors (1890763).

8192821 is a wasteful number, since it uses less digits than its factorization.

8192821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90051.

The product of its digits is 2304, while the sum is 31.

The square root of 8192821 is about 2862.3104304041. The cubic root of 8192821 is about 201.5941021019.

Subtracting from 8192821 its reverse (1282918), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8192821 in words is "eight million, one hundred ninety-two thousand, eight hundred twenty-one".