136720756 has 6 divisors (see below), whose sum is σ = 239261330. Its totient is φ = 68360376.

The previous prime is 136720741. The next prime is 136720769. The reversal of 136720756 is 657027631.

It can be written as a sum of positive squares in only one way, i.e., 75411856 + 61308900 = 8684^2 + 7830^2 .

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, 17090091 + ... + 17090098.

Almost surely, 2^136720756 is an apocalyptic number.

It is an amenable number.

136720756 is a deficient number, since it is larger than the sum of its proper divisors (102540574).

136720756 is a wasteful number, since it uses less digits than its factorization.

136720756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34180193 (or 34180191 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 136720756 is about 11692.7651135221. The cubic root of 136720756 is about 515.1631820213.

The spelling of 136720756 in words is "one hundred thirty-six million, seven hundred twenty thousand, seven hundred fifty-six".