136308665 has 4 divisors (see below), whose sum is σ = 163570404. Its totient is φ = 109046928.

The previous prime is 136308637. The next prime is 136308677. The reversal of 136308665 is 566803631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566803631 = 1601 ⋅354031.

It can be written as a sum of positive squares in 2 ways, for example, as 34480384 + 101828281 = 5872^2 + 10091^2 .

It is a cyclic number.

It is not a de Polignac number, because 136308665 - 2¹² = 136304569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13630862 + ... + 13630871.

It is an arithmetic number, because the mean of its divisors is an integer number (40892601).

Almost surely, 2^136308665 is an apocalyptic number.

It is an amenable number.

136308665 is a deficient number, since it is larger than the sum of its proper divisors (27261739).

136308665 is an equidigital number, since it uses as much as digits as its factorization.

136308665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27261738.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 136308665 is about 11675.1301919936. The cubic root of 136308665 is about 514.6450754628.

The spelling of 136308665 in words is "one hundred thirty-six million, three hundred eight thousand, six hundred sixty-five".