134423213 has 2 divisors, whose sum is σ = 134423214. Its totient is φ = 134423212.

The previous prime is 134423209. The next prime is 134423273. The reversal of 134423213 is 312324431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 56595529 = 8822^2 + 7523^2 .

It is an emirp because it is prime and its reverse (312324431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134423213 - 2² = 134423209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134423273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67211606 + 67211607.

It is an arithmetic number, because the mean of its divisors is an integer number (67211607).

Almost surely, 2^134423213 is an apocalyptic number.

It is an amenable number.

134423213 is a deficient number, since it is larger than the sum of its proper divisors (1).

134423213 is an equidigital number, since it uses as much as digits as its factorization.

134423213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 134423213 is about 11594.1025094657. The cubic root of 134423213 is about 512.2611544602.

Adding to 134423213 its reverse (312324431), we get a palindrome (446747644).

The spelling of 134423213 in words is "one hundred thirty-four million, four hundred twenty-three thousand, two hundred thirteen".