8077979491 has 2 divisors, whose sum is σ = 8077979492. Its totient is φ = 8077979490.

The previous prime is 8077979417. The next prime is 8077979509. The reversal of 8077979491 is 1949797708.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8077979491 - 2⁷ = 8077979363 is a prime.

It is not a weakly prime, because it can be changed into another prime (8077970491) 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, 4038989745 + 4038989746.

It is an arithmetic number, because the mean of its divisors is an integer number (4038989746).

Almost surely, 2^8077979491 is an apocalyptic number.

8077979491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8077979491 is an equidigital number, since it uses as much as digits as its factorization.

8077979491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8001504, while the sum is 61.

The square root of 8077979491 is about 89877.5805804762. The cubic root of 8077979491 is about 2006.4772906234.

The spelling of 8077979491 in words is "eight billion, seventy-seven million, nine hundred seventy-nine thousand, four hundred ninety-one".