135678539 has 2 divisors, whose sum is σ = 135678540. Its totient is φ = 135678538.

The previous prime is 135678527. The next prime is 135678623. The reversal of 135678539 is 935876531.

It is a weak prime.

It is an emirp because it is prime and its reverse (935876531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135678539 - 2¹² = 135674443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135678493 and 135678502.

It is not a weakly prime, because it can be changed into another prime (135678509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67839269 + 67839270.

It is an arithmetic number, because the mean of its divisors is an integer number (67839270).

Almost surely, 2^135678539 is an apocalyptic number.

135678539 is a deficient number, since it is larger than the sum of its proper divisors (1).

135678539 is an equidigital number, since it uses as much as digits as its factorization.

135678539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 135678539 is about 11648.1131089975. The cubic root of 135678539 is about 513.8508186927.

The spelling of 135678539 in words is "one hundred thirty-five million, six hundred seventy-eight thousand, five hundred thirty-nine".