7999221983 has 2 divisors, whose sum is σ = 7999221984. Its totient is φ = 7999221982.

The previous prime is 7999221949. The next prime is 7999222037. The reversal of 7999221983 is 3891229997.

It is a weak prime.

It is an emirp because it is prime and its reverse (3891229997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7999221983 - 2²⁸ = 7730786527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7999221943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999610991 + 3999610992.

It is an arithmetic number, because the mean of its divisors is an integer number (3999610992).

Almost surely, 2^7999221983 is an apocalyptic number.

7999221983 is a deficient number, since it is larger than the sum of its proper divisors (1).

7999221983 is an equidigital number, since it uses as much as digits as its factorization.

7999221983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 59.

The square root of 7999221983 is about 89438.3697469939. The cubic root of 7999221983 is about 1999.9351631481.

The spelling of 7999221983 in words is "seven billion, nine hundred ninety-nine million, two hundred twenty-one thousand, nine hundred eighty-three".