8206828621 has 4 divisors (see below), whose sum is σ = 8221832512. Its totient is φ = 8191824732.

The previous prime is 8206828613. The next prime is 8206828661. The reversal of 8206828621 is 1268286028.

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 8206828621 - 2³ = 8206828613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8206828661) 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, 7501125 + ... + 7502218.

It is an arithmetic number, because the mean of its divisors is an integer number (2055458128).

Almost surely, 2^8206828621 is an apocalyptic number.

It is an amenable number.

8206828621 is a deficient number, since it is larger than the sum of its proper divisors (15003891).

8206828621 is a wasteful number, since it uses less digits than its factorization.

8206828621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15003890.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 8206828621 is about 90591.5482868021. The cubic root of 8206828621 is about 2017.0892807571.

The spelling of 8206828621 in words is "eight billion, two hundred six million, eight hundred twenty-eight thousand, six hundred twenty-one".