136688331 has 32 divisors (see below), whose sum is σ = 204115968. Its totient is φ = 80795520.

The previous prime is 136688317. The next prime is 136688353. The reversal of 136688331 is 133886631.

It is not a de Polignac number, because 136688331 - 2¹⁰ = 136687307 is a prime.

It is a super-2 number, since 2×136688331² = 37367399663131122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 136688331.

It is not an unprimeable number, because it can be changed into a prime (136688311) 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 31 ways as a sum of consecutive naturals, for example, 201565 + ... + 202241.

It is an arithmetic number, because the mean of its divisors is an integer number (6378624).

Almost surely, 2^136688331 is an apocalyptic number.

136688331 is a deficient number, since it is larger than the sum of its proper divisors (67427637).

136688331 is a wasteful number, since it uses less digits than its factorization.

136688331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891.

The product of its digits is 62208, while the sum is 39.

The square root of 136688331 is about 11691.3784901525. The cubic root of 136688331 is about 515.1224530509.

The spelling of 136688331 in words is "one hundred thirty-six million, six hundred eighty-eight thousand, three hundred thirty-one".