136868756 has 6 divisors (see below), whose sum is σ = 239520330. Its totient is φ = 68434376.

The previous prime is 136868749. The next prime is 136868779. The reversal of 136868756 is 657868631.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 89946256 + 46922500 = 9484^2 + 6850^2 .

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 as a sum of consecutive naturals, namely, 17108591 + ... + 17108598.

It is an arithmetic number, because the mean of its divisors is an integer number (39920055).

Almost surely, 2^136868756 is an apocalyptic number.

It is an amenable number.

136868756 is a deficient number, since it is larger than the sum of its proper divisors (102651574).

136868756 is a wasteful number, since it uses less digits than its factorization.

136868756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34217193 (or 34217191 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 136868756 is about 11699.0921015265. The cubic root of 136868756 is about 515.3490027611.

The spelling of 136868756 in words is "one hundred thirty-six million, eight hundred sixty-eight thousand, seven hundred fifty-six".