134243381 has 2 divisors, whose sum is σ = 134243382. Its totient is φ = 134243380.

The previous prime is 134243359. The next prime is 134243449. The reversal of 134243381 is 183342431.

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., 82992100 + 51251281 = 9110^2 + 7159^2 .

It is a cyclic number.

It is not a de Polignac number, because 134243381 - 2¹⁰ = 134242357 is a prime.

It is a super-2 number, since 2×134243381² = 36042570684622322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134243311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67121690 + 67121691.

It is an arithmetic number, because the mean of its divisors is an integer number (67121691).

Almost surely, 2^134243381 is an apocalyptic number.

It is an amenable number.

134243381 is a deficient number, since it is larger than the sum of its proper divisors (1).

134243381 is an equidigital number, since it uses as much as digits as its factorization.

134243381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 134243381 is about 11586.3445918029. The cubic root of 134243381 is about 512.0326173984.

The spelling of 134243381 in words is "one hundred thirty-four million, two hundred forty-three thousand, three hundred eighty-one".