135399 has 12 divisors (see below), whose sum is σ = 198968. Its totient is φ = 81840.

The previous prime is 135391. The next prime is 135403. The reversal of 135399 is 993531.

It is not a de Polignac number, because 135399 - 2³ = 135391 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177 + ... + 549.

2¹³⁵³⁹⁹ is an apocalyptic number.

135399 is a deficient number, since it is larger than the sum of its proper divisors (63569).

135399 is a wasteful number, since it uses less digits than its factorization.

135399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 387 counting only the distinct ones).

The product of its digits is 3645, while the sum is 30.

The square root of 135399 is about 367.9660310409. The cubic root of 135399 is about 51.3497679804.

The spelling of 135399 in words is "one hundred thirty-five thousand, three hundred ninety-nine".