135686969 has 16 divisors (see below), whose sum is σ = 158077440. Its totient is φ = 115248000.

The previous prime is 135686963. The next prime is 135687001. The reversal of 135686969 is 969686531.

It is a cyclic number.

It is not a de Polignac number, because 135686969 - 2⁸ = 135686713 is a prime.

It is a super-2 number, since 2×135686969² = 36821907112813922, which contains 22 as substring.

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 135686969.

It is not an unprimeable number, because it can be changed into a prime (135686963) 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 15 ways as a sum of consecutive naturals, for example, 3029 + ... + 16749.

It is an arithmetic number, because the mean of its divisors is an integer number (9879840).

Almost surely, 2^135686969 is an apocalyptic number.

It is an amenable number.

135686969 is a deficient number, since it is larger than the sum of its proper divisors (22390471).

135686969 is a wasteful number, since it uses less digits than its factorization.

135686969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792.

The product of its digits is 2099520, while the sum is 53.

The square root of 135686969 is about 11648.4749645608. The cubic root of 135686969 is about 513.8614606919.

The spelling of 135686969 in words is "one hundred thirty-five million, six hundred eighty-six thousand, nine hundred sixty-nine".