8304842521 has 2 divisors, whose sum is σ = 8304842522. Its totient is φ = 8304842520.

The previous prime is 8304842503. The next prime is 8304842527. The reversal of 8304842521 is 1252484038.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5630401296 + 2674441225 = 75036^2 + 51715^2 .

It is a cyclic number.

It is not a de Polignac number, because 8304842521 - 2²⁷ = 8170624793 is a prime.

It is not a weakly prime, because it can be changed into another prime (8304842527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4152421260 + 4152421261.

It is an arithmetic number, because the mean of its divisors is an integer number (4152421261).

Almost surely, 2^8304842521 is an apocalyptic number.

It is an amenable number.

8304842521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8304842521 is an equidigital number, since it uses as much as digits as its factorization.

8304842521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 8304842521 is about 91130.9087028106. The cubic root of 8304842521 is about 2025.0875353920.

The spelling of 8304842521 in words is "eight billion, three hundred four million, eight hundred forty-two thousand, five hundred twenty-one".