135986243 has 4 divisors (see below), whose sum is σ = 140372928. Its totient is φ = 131599560.

The previous prime is 135986239. The next prime is 135986251. The reversal of 135986243 is 342689531.

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 135986243 - 2² = 135986239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135986243.

It is not an unprimeable number, because it can be changed into a prime (135986203) 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, 2193296 + ... + 2193357.

It is an arithmetic number, because the mean of its divisors is an integer number (35093232).

Almost surely, 2^135986243 is an apocalyptic number.

135986243 is a deficient number, since it is larger than the sum of its proper divisors (4386685).

135986243 is an equidigital number, since it uses as much as digits as its factorization.

135986243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386684.

The product of its digits is 155520, while the sum is 41.

The square root of 135986243 is about 11661.3139482650. The cubic root of 135986243 is about 514.2389777818.

The spelling of 135986243 in words is "one hundred thirty-five million, nine hundred eighty-six thousand, two hundred forty-three".