136730005 has 4 divisors (see below), whose sum is σ = 164076012. Its totient is φ = 109384000.

The previous prime is 136729969. The next prime is 136730021. The reversal of 136730005 is 500037631.

It is a happy number.

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 92294449 + 44435556 = 9607^2 + 6666^2 .

It is not a de Polignac number, because 136730005 - 2¹⁵ = 136697237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13672996 + ... + 13673005.

It is an arithmetic number, because the mean of its divisors is an integer number (41019003).

Almost surely, 2^136730005 is an apocalyptic number.

It is an amenable number.

136730005 is a deficient number, since it is larger than the sum of its proper divisors (27346007).

136730005 is an equidigital number, since it uses as much as digits as its factorization.

136730005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27346006.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 136730005 is about 11693.1606078083. The cubic root of 136730005 is about 515.1747984893.

Adding to 136730005 its reverse (500037631), we get a palindrome (636767636).

The spelling of 136730005 in words is "one hundred thirty-six million, seven hundred thirty thousand, five".