136685539 has 4 divisors (see below), whose sum is σ = 136724400. Its totient is φ = 136646680.

The previous prime is 136685537. The next prime is 136685551. The reversal of 136685539 is 935586631.

136685539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 136685539 - 2¹ = 136685537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136685533) 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, 13564 + ... + 21385.

It is an arithmetic number, because the mean of its divisors is an integer number (34181100).

Almost surely, 2^136685539 is an apocalyptic number.

136685539 is a deficient number, since it is larger than the sum of its proper divisors (38861).

136685539 is an equidigital number, since it uses as much as digits as its factorization.

136685539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38860.

The product of its digits is 583200, while the sum is 46.

The square root of 136685539 is about 11691.2590853167. The cubic root of 136685539 is about 515.1189457247.

The spelling of 136685539 in words is "one hundred thirty-six million, six hundred eighty-five thousand, five hundred thirty-nine".