135663 has 8 divisors (see below), whose sum is σ = 197376. Its totient is φ = 82200.

The previous prime is 135661. The next prime is 135671. The reversal of 135663 is 366531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135663 - 2¹ = 135661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (24672).

2¹³⁵⁶⁶³ is an apocalyptic number.

135663 is a deficient number, since it is larger than the sum of its proper divisors (61713).

135663 is a wasteful number, since it uses less digits than its factorization.

135663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125.

The product of its digits is 1620, while the sum is 24.

The square root of 135663 is about 368.3245851148. The cubic root of 135663 is about 51.3831201164.

The spelling of 135663 in words is "one hundred thirty-five thousand, six hundred sixty-three".