136623005 has 4 divisors (see below), whose sum is σ = 163947612. Its totient is φ = 109298400.

The previous prime is 136623001. The next prime is 136623023. The reversal of 136623005 is 500326631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500326631 = 7 ⋅71475233.

It can be written as a sum of positive squares in 2 ways, for example, as 34269316 + 102353689 = 5854^2 + 10117^2 .

It is not a de Polignac number, because 136623005 - 2² = 136623001 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 (136623001) 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, 13662296 + ... + 13662305.

It is an arithmetic number, because the mean of its divisors is an integer number (40986903).

Almost surely, 2^136623005 is an apocalyptic number.

It is an amenable number.

136623005 is a deficient number, since it is larger than the sum of its proper divisors (27324607).

136623005 is an equidigital number, since it uses as much as digits as its factorization.

136623005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27324606.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 136623005 is about 11688.5843881969. The cubic root of 136623005 is about 515.0403776429.

Adding to 136623005 its reverse (500326631), we get a palindrome (636949636).

The spelling of 136623005 in words is "one hundred thirty-six million, six hundred twenty-three thousand, five".