3668213 has 2 divisors, whose sum is σ = 3668214. Its totient is φ = 3668212.

The previous prime is 3668179. The next prime is 3668221. The reversal of 3668213 is 3128663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2582449 + 1085764 = 1607^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 3668213 - 2¹² = 3664117 is a prime.

It is a super-2 number, since 2×3668213² = 26911573226738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3668233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1834106 + 1834107.

It is an arithmetic number, because the mean of its divisors is an integer number (1834107).

Almost surely, 2^3668213 is an apocalyptic number.

It is an amenable number.

3668213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3668213 is an equidigital number, since it uses as much as digits as its factorization.

3668213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 3668213 is about 1915.2579460741. The cubic root of 3668213 is about 154.2238410126.

The spelling of 3668213 in words is "three million, six hundred sixty-eight thousand, two hundred thirteen".