135909139 has 4 divisors (see below), whose sum is σ = 141818256. Its totient is φ = 130000024.

The previous prime is 135909127. The next prime is 135909181. The reversal of 135909139 is 931909531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135909139 - 2⁵ = 135909107 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135949139) 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 3 ways as a sum of consecutive naturals, for example, 2954524 + ... + 2954569.

It is an arithmetic number, because the mean of its divisors is an integer number (35454564).

Almost surely, 2^135909139 is an apocalyptic number.

135909139 is a deficient number, since it is larger than the sum of its proper divisors (5909117).

135909139 is an equidigital number, since it uses as much as digits as its factorization.

135909139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909116.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 135909139 is about 11658.0075055732. The cubic root of 135909139 is about 514.1417684920.

The spelling of 135909139 in words is "one hundred thirty-five million, nine hundred nine thousand, one hundred thirty-nine".