134668213 has 2 divisors, whose sum is σ = 134668214. Its totient is φ = 134668212.

The previous prime is 134668211. The next prime is 134668223. The reversal of 134668213 is 312866431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120956004 + 13712209 = 10998^2 + 3703^2 .

It is an emirp because it is prime and its reverse (312866431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134668213 - 2¹ = 134668211 is a prime.

It is a super-2 number, since 2×134668213² = 36271055185226738, which contains 22 as substring.

Together with 134668211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134668211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67334106 + 67334107.

It is an arithmetic number, because the mean of its divisors is an integer number (67334107).

Almost surely, 2^134668213 is an apocalyptic number.

It is an amenable number.

134668213 is a deficient number, since it is larger than the sum of its proper divisors (1).

134668213 is an equidigital number, since it uses as much as digits as its factorization.

134668213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 134668213 is about 11604.6634160582. The cubic root of 134668213 is about 512.5721816239.

The spelling of 134668213 in words is "one hundred thirty-four million, six hundred sixty-eight thousand, two hundred thirteen".