647362213 has 2 divisors, whose sum is σ = 647362214. Its totient is φ = 647362212.

The previous prime is 647362211. The next prime is 647362259. The reversal of 647362213 is 312263746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 610188804 + 37173409 = 24702^2 + 6097^2 .

It is a cyclic number.

It is not a de Polignac number, because 647362213 - 2¹ = 647362211 is a prime.

Together with 647362211, it forms a pair of twin primes.

It is equal to p_33663382 and since 647362213 and 33663382 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647362211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323681106 + 323681107.

It is an arithmetic number, because the mean of its divisors is an integer number (323681107).

Almost surely, 2^647362213 is an apocalyptic number.

It is an amenable number.

647362213 is a deficient number, since it is larger than the sum of its proper divisors (1).

647362213 is an equidigital number, since it uses as much as digits as its factorization.

647362213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 34.

The square root of 647362213 is about 25443.3137189321. The cubic root of 647362213 is about 865.0657452785.

It can be divided in two parts, 6473 and 62213, that added together give a palindrome (68686).

The spelling of 647362213 in words is "six hundred forty-seven million, three hundred sixty-two thousand, two hundred thirteen".