677318717 has 2 divisors, whose sum is σ = 677318718. Its totient is φ = 677318716.

The previous prime is 677318689. The next prime is 677318753. The reversal of 677318717 is 717813776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439573156 + 237745561 = 20966^2 + 15419^2 .

It is a cyclic number.

It is not a de Polignac number, because 677318717 - 2¹⁴ = 677302333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677318797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338659358 + 338659359.

It is an arithmetic number, because the mean of its divisors is an integer number (338659359).

Almost surely, 2^677318717 is an apocalyptic number.

It is an amenable number.

677318717 is a deficient number, since it is larger than the sum of its proper divisors (1).

677318717 is an equidigital number, since it uses as much as digits as its factorization.

677318717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345744, while the sum is 47.

The square root of 677318717 is about 26025.3475865357. The cubic root of 677318717 is about 878.2086134707.

The spelling of 677318717 in words is "six hundred seventy-seven million, three hundred eighteen thousand, seven hundred seventeen".