135689533 has 4 divisors (see below), whose sum is σ = 155073760. Its totient is φ = 116305308.

The previous prime is 135689527. The next prime is 135689549. The reversal of 135689533 is 335986531.

135689533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-135689533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135689533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135689503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9692103 + ... + 9692116.

It is an arithmetic number, because the mean of its divisors is an integer number (38768440).

Almost surely, 2^135689533 is an apocalyptic number.

It is an amenable number.

135689533 is a deficient number, since it is larger than the sum of its proper divisors (19384227).

135689533 is an equidigital number, since it uses as much as digits as its factorization.

135689533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19384226.

The product of its digits is 291600, while the sum is 43.

The square root of 135689533 is about 11648.5850213663. The cubic root of 135689533 is about 513.8646973880.

The spelling of 135689533 in words is "one hundred thirty-five million, six hundred eighty-nine thousand, five hundred thirty-three".