136812605 has 4 divisors (see below), whose sum is σ = 164175132. Its totient is φ = 109450080.

The previous prime is 136812587. The next prime is 136812607. The reversal of 136812605 is 506218631.

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 41964484 + 94848121 = 6478^2 + 9739^2 .

It is not a de Polignac number, because 136812605 - 2¹⁶ = 136747069 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 (136812607) 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, 13681256 + ... + 13681265.

It is an arithmetic number, because the mean of its divisors is an integer number (41043783).

Almost surely, 2^136812605 is an apocalyptic number.

It is an amenable number.

136812605 is a deficient number, since it is larger than the sum of its proper divisors (27362527).

136812605 is an equidigital number, since it uses as much as digits as its factorization.

136812605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27362526.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 136812605 is about 11696.6920537390. The cubic root of 136812605 is about 515.2785184012.

The spelling of 136812605 in words is "one hundred thirty-six million, eight hundred twelve thousand, six hundred five".