136681173 has 12 divisors (see below), whose sum is σ = 209042028. Its totient is φ = 85760640.

The previous prime is 136681159. The next prime is 136681187. The reversal of 136681173 is 371186631.

It is an interprime number because it is at equal distance from previous prime (136681159) and next prime (136681187).

It can be written as a sum of positive squares in 2 ways, for example, as 81595089 + 55086084 = 9033^2 + 7422^2 .

It is not a de Polignac number, because 136681173 - 2⁶ = 136681109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136681373) 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 11 ways as a sum of consecutive naturals, for example, 446518 + ... + 446823.

It is an arithmetic number, because the mean of its divisors is an integer number (17420169).

Almost surely, 2^136681173 is an apocalyptic number.

It is an amenable number.

136681173 is a deficient number, since it is larger than the sum of its proper divisors (72360855).

136681173 is a wasteful number, since it uses less digits than its factorization.

136681173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893364 (or 893361 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 136681173 is about 11691.0723631325. The cubic root of 136681173 is about 515.1134610351.

It can be divided in two parts, 13668 and 1173, that added together give a palindrome (14841).

The spelling of 136681173 in words is "one hundred thirty-six million, six hundred eighty-one thousand, one hundred seventy-three".