135540539 has 4 divisors (see below), whose sum is σ = 136530024. Its totient is φ = 134551056.

The previous prime is 135540533. The next prime is 135540563. The reversal of 135540539 is 935045531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135540539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135540499 and 135540508.

It is not an unprimeable number, because it can be changed into a prime (135540533) 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, 494537 + ... + 494810.

It is an arithmetic number, because the mean of its divisors is an integer number (34132506).

Almost surely, 2^135540539 is an apocalyptic number.

135540539 is a deficient number, since it is larger than the sum of its proper divisors (989485).

135540539 is an equidigital number, since it uses as much as digits as its factorization.

135540539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989484.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 135540539 is about 11642.1878957522. The cubic root of 135540539 is about 513.6765453240.

The spelling of 135540539 in words is "one hundred thirty-five million, five hundred forty thousand, five hundred thirty-nine".