135682559 has 4 divisors (see below), whose sum is σ = 143663904. Its totient is φ = 127701216.

The previous prime is 135682549. The next prime is 135682577. The reversal of 135682559 is 955286531.

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-135682559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135682549) 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, 3990647 + ... + 3990680.

It is an arithmetic number, because the mean of its divisors is an integer number (35915976).

Almost surely, 2^135682559 is an apocalyptic number.

135682559 is a deficient number, since it is larger than the sum of its proper divisors (7981345).

135682559 is an equidigital number, since it uses as much as digits as its factorization.

135682559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7981344.

The product of its digits is 324000, while the sum is 44.

The square root of 135682559 is about 11648.2856678569. The cubic root of 135682559 is about 513.8558935800.

The spelling of 135682559 in words is "one hundred thirty-five million, six hundred eighty-two thousand, five hundred fifty-nine".