7928572849 has 2 divisors, whose sum is σ = 7928572850. Its totient is φ = 7928572848.

The previous prime is 7928572823. The next prime is 7928572877. The reversal of 7928572849 is 9482758297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4444622224 + 3483950625 = 66668^2 + 59025^2 .

It is a cyclic number.

It is not a de Polignac number, because 7928572849 - 2⁷ = 7928572721 is a prime.

It is not a weakly prime, because it can be changed into another prime (7928572879) 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 as a sum of consecutive naturals, namely, 3964286424 + 3964286425.

It is an arithmetic number, because the mean of its divisors is an integer number (3964286425).

Almost surely, 2^7928572849 is an apocalyptic number.

It is an amenable number.

7928572849 is a deficient number, since it is larger than the sum of its proper divisors (1).

7928572849 is an equidigital number, since it uses as much as digits as its factorization.

7928572849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 61.

The square root of 7928572849 is about 89042.5339318238. The cubic root of 7928572849 is about 1994.0299343064.

The spelling of 7928572849 in words is "seven billion, nine hundred twenty-eight million, five hundred seventy-two thousand, eight hundred forty-nine".