7922728643 has 2 divisors, whose sum is σ = 7922728644. Its totient is φ = 7922728642.

The previous prime is 7922728633. The next prime is 7922728669. The reversal of 7922728643 is 3468272297.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7922728643 - 2²⁸ = 7654293187 is a prime.

It is a super-2 number, since 2×7922728643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7922728591 and 7922728600.

It is not a weakly prime, because it can be changed into another prime (7922728633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961364321 + 3961364322.

It is an arithmetic number, because the mean of its divisors is an integer number (3961364322).

Almost surely, 2^7922728643 is an apocalyptic number.

7922728643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7922728643 is an equidigital number, since it uses as much as digits as its factorization.

7922728643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 50.

The square root of 7922728643 is about 89009.7109477387. The cubic root of 7922728643 is about 1993.5398761165.

The spelling of 7922728643 in words is "seven billion, nine hundred twenty-two million, seven hundred twenty-eight thousand, six hundred forty-three".