7990543679 has 2 divisors, whose sum is σ = 7990543680. Its totient is φ = 7990543678.

The previous prime is 7990543661. The next prime is 7990543721. The reversal of 7990543679 is 9763450997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7990543679 - 2²⁰ = 7989495103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7990543279) 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, 3995271839 + 3995271840.

It is an arithmetic number, because the mean of its divisors is an integer number (3995271840).

Almost surely, 2^7990543679 is an apocalyptic number.

7990543679 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990543679 is an equidigital number, since it uses as much as digits as its factorization.

7990543679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 59.

The square root of 7990543679 is about 89389.8410279378. The cubic root of 7990543679 is about 1999.2116625529.

The spelling of 7990543679 in words is "seven billion, nine hundred ninety million, five hundred forty-three thousand, six hundred seventy-nine".