135686219 has 8 divisors (see below), whose sum is σ = 138309360. Its totient is φ = 133088256.

The previous prime is 135686191. The next prime is 135686233. The reversal of 135686219 is 912686531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135686219 is a prime.

It is a super-2 number, since 2×135686219² = 36821500053031922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135686279) 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 in 7 ways as a sum of consecutive naturals, for example, 4772 + ... + 17150.

It is an arithmetic number, because the mean of its divisors is an integer number (17288670).

Almost surely, 2^135686219 is an apocalyptic number.

135686219 is a deficient number, since it is larger than the sum of its proper divisors (2623141).

135686219 is a wasteful number, since it uses less digits than its factorization.

135686219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12589.

The product of its digits is 77760, while the sum is 41.

The square root of 135686219 is about 11648.4427714609. The cubic root of 135686219 is about 513.8605139126.

The spelling of 135686219 in words is "one hundred thirty-five million, six hundred eighty-six thousand, two hundred nineteen".