135491686 has 12 divisors (see below), whose sum is σ = 223393716. Its totient is φ = 61587020.

The previous prime is 135491677. The next prime is 135491701. The reversal of 135491686 is 686194531.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 279700 + ... + 280183.

It is an arithmetic number, because the mean of its divisors is an integer number (18616143).

Almost surely, 2^135491686 is an apocalyptic number.

135491686 is a deficient number, since it is larger than the sum of its proper divisors (87902030).

135491686 is a wasteful number, since it uses less digits than its factorization.

135491686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559907 (or 559896 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 135491686 is about 11640.0896044661. The cubic root of 135491686 is about 513.6148229394.

The spelling of 135491686 in words is "one hundred thirty-five million, four hundred ninety-one thousand, six hundred eighty-six".