136856705 has 8 divisors (see below), whose sum is σ = 164488104. Its totient is φ = 109312000.

The previous prime is 136856683. The next prime is 136856719. The reversal of 136856705 is 507658631.

It can be written as a sum of positive squares in 4 ways, for example, as 73479184 + 63377521 = 8572^2 + 7961^2 .

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

It is not a de Polignac number, because 136856705 - 2¹⁶ = 136791169 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 (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18146 + ... + 24555.

It is an arithmetic number, because the mean of its divisors is an integer number (20561013).

Almost surely, 2^136856705 is an apocalyptic number.

It is an amenable number.

136856705 is a deficient number, since it is larger than the sum of its proper divisors (27631399).

136856705 is an equidigital number, since it uses as much as digits as its factorization.

136856705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43347.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 136856705 is about 11698.5770502228. The cubic root of 136856705 is about 515.3338771929. Note that the first 3 decimals are identical.

The spelling of 136856705 in words is "one hundred thirty-six million, eight hundred fifty-six thousand, seven hundred five".