8252838721 has 4 divisors (see below), whose sum is σ = 8256178372. Its totient is φ = 8249499072.

The previous prime is 8252838719. The next prime is 8252838793. The reversal of 8252838721 is 1278382528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7437165121 + 815673600 = 86239^2 + 28560^2 .

It is a cyclic number.

It is not a de Polignac number, because 8252838721 - 2¹ = 8252838719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8252838701) 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 3 ways as a sum of consecutive naturals, for example, 1666116 + ... + 1671061.

It is an arithmetic number, because the mean of its divisors is an integer number (2064044593).

Almost surely, 2^8252838721 is an apocalyptic number.

It is an amenable number.

8252838721 is a deficient number, since it is larger than the sum of its proper divisors (3339651).

8252838721 is a wasteful number, since it uses less digits than its factorization.

8252838721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339650.

The product of its digits is 430080, while the sum is 46.

The square root of 8252838721 is about 90845.1359237246. The cubic root of 8252838721 is about 2020.8517403592.

The spelling of 8252838721 in words is "eight billion, two hundred fifty-two million, eight hundred thirty-eight thousand, seven hundred twenty-one".