27668213 has 4 divisors (see below), whose sum is σ = 28560768. Its totient is φ = 26775660.

The previous prime is 27668189. The next prime is 27668293. The reversal of 27668213 is 31286672.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27668213 - 2⁸ = 27667957 is a prime.

It is a super-2 number, since 2×27668213² = 1531060021226738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27668293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446231 + ... + 446292.

It is an arithmetic number, because the mean of its divisors is an integer number (7140192).

Almost surely, 2^27668213 is an apocalyptic number.

It is an amenable number.

27668213 is a deficient number, since it is larger than the sum of its proper divisors (892555).

27668213 is an equidigital number, since it uses as much as digits as its factorization.

27668213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892554.

The product of its digits is 24192, while the sum is 35.

The square root of 27668213 is about 5260.0582696392. The cubic root of 27668213 is about 302.4547226362.

The spelling of 27668213 in words is "twenty-seven million, six hundred sixty-eight thousand, two hundred thirteen".