135599 has 2 divisors, whose sum is σ = 135600.
Its totient is φ = 135598.
The previous prime is 135593. The next prime is 135601. The reversal of 135599 is 995531.
135599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is an emirp because it is prime and its reverse (995531) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-135599 is a prime.
Together with 135601, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (135593) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67799 + 67800.
It is an arithmetic number, because the mean of its divisors is an integer number (67800).
2135599 is an apocalyptic number.
135599 is a deficient number, since it is larger than the sum of its proper divisors (1).
135599 is an equidigital number, since it uses as much as digits as its factorization.
135599 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 6075, while the sum is 32.
The square root of 135599 is about 368.2376949743.
The cubic root of 135599 is about 51.3750387262.
The spelling of 135599 in words is "one hundred thirty-five thousand, five hundred ninety-nine".