136670005 has 4 divisors (see below), whose sum is σ = 164004012. Its totient is φ = 109336000.

The previous prime is 136670003. The next prime is 136670047. The reversal of 136670005 is 500076631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70459236 + 66210769 = 8394^2 + 8137^2 .

It is not a de Polignac number, because 136670005 - 2¹ = 136670003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136670003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13666996 + ... + 13667005.

It is an arithmetic number, because the mean of its divisors is an integer number (41001003).

Almost surely, 2^136670005 is an apocalyptic number.

It is an amenable number.

136670005 is a deficient number, since it is larger than the sum of its proper divisors (27334007).

136670005 is an equidigital number, since it uses as much as digits as its factorization.

136670005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27334006.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 136670005 is about 11690.5947239651. The cubic root of 136670005 is about 515.0994309540.

The spelling of 136670005 in words is "one hundred thirty-six million, six hundred seventy thousand, five".