136306505 has 4 divisors (see below), whose sum is σ = 163567812. Its totient is φ = 109045200.

The previous prime is 136306453. The next prime is 136306523. The reversal of 136306505 is 505603631.

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 76877824 + 59428681 = 8768^2 + 7709^2 .

It is not a de Polignac number, because 136306505 - 2⁸ = 136306249 is a prime.

It is a Duffinian 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, 13630646 + ... + 13630655.

It is an arithmetic number, because the mean of its divisors is an integer number (40891953).

Almost surely, 2^136306505 is an apocalyptic number.

It is an amenable number.

136306505 is a deficient number, since it is larger than the sum of its proper divisors (27261307).

136306505 is an equidigital number, since it uses as much as digits as its factorization.

136306505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27261306.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 136306505 is about 11675.0376873053. The cubic root of 136306505 is about 514.6423570266.

The spelling of 136306505 in words is "one hundred thirty-six million, three hundred six thousand, five hundred five".