82664213 has 2 divisors, whose sum is σ = 82664214. Its totient is φ = 82664212.

The previous prime is 82664209. The next prime is 82664221. The reversal of 82664213 is 31246628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52171729 + 30492484 = 7223^2 + 5522^2 .

It is a cyclic number.

It is not a de Polignac number, because 82664213 - 2² = 82664209 is a prime.

It is a super-2 number, since 2×82664213² = 13666744221818738, 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 82664213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82664233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41332106 + 41332107.

It is an arithmetic number, because the mean of its divisors is an integer number (41332107).

Almost surely, 2^82664213 is an apocalyptic number.

It is an amenable number.

82664213 is a deficient number, since it is larger than the sum of its proper divisors (1).

82664213 is an equidigital number, since it uses as much as digits as its factorization.

82664213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 82664213 is about 9091.9861966459. The cubic root of 82664213 is about 435.6180284621.

The spelling of 82664213 in words is "eighty-two million, six hundred sixty-four thousand, two hundred thirteen".