135389 has 2 divisors, whose sum is σ = 135390. Its totient is φ = 135388.

The previous prime is 135367. The next prime is 135391. The reversal of 135389 is 983531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 7225 = 358^2 + 85^2 .

It is an emirp because it is prime and its reverse (983531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135389 - 2¹² = 131293 is a prime.

Together with 135391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135319) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67694 + 67695.

It is an arithmetic number, because the mean of its divisors is an integer number (67695).

2¹³⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

135389 is a deficient number, since it is larger than the sum of its proper divisors (1).

135389 is an equidigital number, since it uses as much as digits as its factorization.

135389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 135389 is about 367.9524425792. The cubic root of 135389 is about 51.3485037901.

The spelling of 135389 in words is "one hundred thirty-five thousand, three hundred eighty-nine".