136688746 has 8 divisors (see below), whose sum is σ = 205083684. Its totient is φ = 68327520.

The previous prime is 136688743. The next prime is 136688801. The reversal of 136688746 is 647886631.

It can be written as a sum of positive squares in 2 ways, for example, as 131675625 + 5013121 = 11475^2 + 2239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 136688746.

It is not an unprimeable number, because it can be changed into a prime (136688743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8556 + ... + 18616.

Almost surely, 2^136688746 is an apocalyptic number.

136688746 is a deficient number, since it is larger than the sum of its proper divisors (68394938).

136688746 is a wasteful number, since it uses less digits than its factorization.

136688746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16856.

The product of its digits is 1161216, while the sum is 49.

The square root of 136688746 is about 11691.3962382600. The cubic root of 136688746 is about 515.1229743722.

The spelling of 136688746 in words is "one hundred thirty-six million, six hundred eighty-eight thousand, seven hundred forty-six".