676218217 has 4 divisors (see below), whose sum is σ = 678659716. Its totient is φ = 673776720.

The previous prime is 676218211. The next prime is 676218229. The reversal of 676218217 is 712812676.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114575616 + 561642601 = 10704^2 + 23699^2 .

It is a cyclic number.

It is not a de Polignac number, because 676218217 - 2⁷ = 676218089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 676218217.

It is not an unprimeable number, because it can be changed into a prime (676218211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220334 + ... + 1220887.

It is an arithmetic number, because the mean of its divisors is an integer number (169664929).

Almost surely, 2^676218217 is an apocalyptic number.

It is an amenable number.

676218217 is a deficient number, since it is larger than the sum of its proper divisors (2441499).

676218217 is a wasteful number, since it uses less digits than its factorization.

676218217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441498.

The product of its digits is 56448, while the sum is 40.

The square root of 676218217 is about 26004.1961421614. The cubic root of 676218217 is about 877.7327210715.

The spelling of 676218217 in words is "six hundred seventy-six million, two hundred eighteen thousand, two hundred seventeen".