135339881 has 4 divisors (see below), whose sum is σ = 135505152. Its totient is φ = 135174612.

The previous prime is 135339851. The next prime is 135339887. The reversal of 135339881 is 188933531.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 188933531 = 61 ⋅3097271.

It is a cyclic number.

It is not a de Polignac number, because 135339881 - 2⁶ = 135339817 is a prime.

It is a super-2 number, since 2×135339881² = 36633766778188322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135339887) 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, 81401 + ... + 83046.

It is an arithmetic number, because the mean of its divisors is an integer number (33876288).

Almost surely, 2^135339881 is an apocalyptic number.

It is an amenable number.

135339881 is a deficient number, since it is larger than the sum of its proper divisors (165271).

135339881 is an equidigital number, since it uses as much as digits as its factorization.

135339881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165270.

The product of its digits is 77760, while the sum is 41.

The square root of 135339881 is about 11633.5669938330. The cubic root of 135339881 is about 513.4229330959.

The spelling of 135339881 in words is "one hundred thirty-five million, three hundred thirty-nine thousand, eight hundred eighty-one".