135583 has 6 divisors (see below), whose sum is σ = 157776. Its totient is φ = 116172.

The previous prime is 135581. The next prime is 135589. The reversal of 135583 is 385531.

It is a happy number.

135583 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135583 - 2¹ = 135581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1335 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (26296).

2¹³⁵⁵⁸³ is an apocalyptic number.

135583 is a deficient number, since it is larger than the sum of its proper divisors (22193).

135583 is an equidigital number, since it uses as much as digits as its factorization.

135583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781 (or 2774 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 135583 is about 368.2159692354. The cubic root of 135583 is about 51.3730179813.

The spelling of 135583 in words is "one hundred thirty-five thousand, five hundred eighty-three".