136805968 has 30 divisors (see below), whose sum is σ = 285803322. Its totient is φ = 63063360.

The previous prime is 136805951. The next prime is 136805969. The reversal of 136805968 is 869508631.

It can be written as a sum of positive squares in only one way, i.e., 94711824 + 42094144 = 9732^2 + 6488^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136805969) 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 5 ways as a sum of consecutive naturals, for example, 168283 + ... + 169093.

Almost surely, 2^136805968 is an apocalyptic number.

It is an amenable number.

136805968 is an abundant number, since it is smaller than the sum of its proper divisors (148997354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136805968 is an frugal number, since it uses more digits than its factorization.

136805968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 136805968 is about 11696.4083376052. The cubic root of 136805968 is about 515.2701859360.

The spelling of 136805968 in words is "one hundred thirty-six million, eight hundred five thousand, nine hundred sixty-eight".