135669 has 8 divisors (see below), whose sum is σ = 185472. Its totient is φ = 88160.

The previous prime is 135661. The next prime is 135671. The reversal of 135669 is 966531.

It is a happy number.

135669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 135669 - 2³ = 135661 is a prime.

It is a super-2 number, since 2×135669² = 36812155122, which contains 22 as substring.

It is a plaindrome in base 10.

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, 429 + ... + 674.

It is an arithmetic number, because the mean of its divisors is an integer number (23184).

2¹³⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

135669 is a deficient number, since it is larger than the sum of its proper divisors (49803).

135669 is a wasteful number, since it uses less digits than its factorization.

135669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147.

The product of its digits is 4860, while the sum is 30.

The square root of 135669 is about 368.3327300146. The cubic root of 135669 is about 51.3838776165.

The spelling of 135669 in words is "one hundred thirty-five thousand, six hundred sixty-nine".