672217313 has 2 divisors, whose sum is σ = 672217314. Its totient is φ = 672217312.

The previous prime is 672217307. The next prime is 672217327. The reversal of 672217313 is 313712276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484308049 + 187909264 = 22007^2 + 13708^2 .

It is a cyclic number.

It is not a de Polignac number, because 672217313 - 2²⁰ = 671168737 is a prime.

It is a super-2 number, since 2×672217313² = 903752231793879938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 672217313.

It is not a weakly prime, because it can be changed into another prime (672211313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336108656 + 336108657.

It is an arithmetic number, because the mean of its divisors is an integer number (336108657).

Almost surely, 2^672217313 is an apocalyptic number.

It is an amenable number.

672217313 is a deficient number, since it is larger than the sum of its proper divisors (1).

672217313 is an equidigital number, since it uses as much as digits as its factorization.

672217313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 32.

The square root of 672217313 is about 25927.1539703069. The cubic root of 672217313 is about 875.9982351076.

Adding to 672217313 its reverse (313712276), we get a palindrome (985929589).

The spelling of 672217313 in words is "six hundred seventy-two million, two hundred seventeen thousand, three hundred thirteen".