135020139 has 8 divisors (see below), whose sum is σ = 180498432. Its totient is φ = 89777640.

The previous prime is 135020131. The next prime is 135020183. The reversal of 135020139 is 931020531.

It is a happy number.

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

It is not a de Polignac number, because 135020139 - 2³ = 135020131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135020131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57607 + ... + 59904.

It is an arithmetic number, because the mean of its divisors is an integer number (22562304).

Almost surely, 2^135020139 is an apocalyptic number.

135020139 is a deficient number, since it is larger than the sum of its proper divisors (45478293).

135020139 is a wasteful number, since it uses less digits than its factorization.

135020139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117897.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 135020139 is about 11619.8166508771. The cubic root of 135020139 is about 513.0182917758.

The spelling of 135020139 in words is "one hundred thirty-five million, twenty thousand, one hundred thirty-nine".