77009394017 has 2 divisors, whose sum is σ = 77009394018. Its totient is φ = 77009394016.

The previous prime is 77009393999. The next prime is 77009394071. The reversal of 77009394017 is 71049390077.

Together with next prime (77009394071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69187937296 + 7821456721 = 263036^2 + 88439^2 .

It is a cyclic number.

It is not a de Polignac number, because 77009394017 - 2⁶ = 77009393953 is a prime.

It is not a weakly prime, because it can be changed into another prime (77009394097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38504697008 + 38504697009.

It is an arithmetic number, because the mean of its divisors is an integer number (38504697009).

Almost surely, 2^77009394017 is an apocalyptic number.

It is an amenable number.

77009394017 is a deficient number, since it is larger than the sum of its proper divisors (1).

77009394017 is an equidigital number, since it uses as much as digits as its factorization.

77009394017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 333396, while the sum is 47.

The spelling of 77009394017 in words is "seventy-seven billion, nine million, three hundred ninety-four thousand, seventeen".