136313561 has 4 divisors (see below), whose sum is σ = 139638324. Its totient is φ = 132988800.

The previous prime is 136313537. The next prime is 136313627. The reversal of 136313561 is 165313631.

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 74926336 + 61387225 = 8656^2 + 7835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136313561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136313501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662320 + ... + 1662401.

It is an arithmetic number, because the mean of its divisors is an integer number (34909581).

Almost surely, 2^136313561 is an apocalyptic number.

It is an amenable number.

136313561 is a deficient number, since it is larger than the sum of its proper divisors (3324763).

136313561 is an equidigital number, since it uses as much as digits as its factorization.

136313561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324762.

The product of its digits is 4860, while the sum is 29.

The square root of 136313561 is about 11675.3398665735. The cubic root of 136313561 is about 514.6512371452.

The spelling of 136313561 in words is "one hundred thirty-six million, three hundred thirteen thousand, five hundred sixty-one".