136361609 has 4 divisors (see below), whose sum is σ = 136630020. Its totient is φ = 136093200.

The previous prime is 136361593. The next prime is 136361639. The reversal of 136361609 is 906163631.

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 107578384 + 28783225 = 10372^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 136361609 - 2⁴ = 136361593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136361639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133442 + ... + 134459.

It is an arithmetic number, because the mean of its divisors is an integer number (34157505).

Almost surely, 2^136361609 is an apocalyptic number.

It is an amenable number.

136361609 is a deficient number, since it is larger than the sum of its proper divisors (268411).

136361609 is an equidigital number, since it uses as much as digits as its factorization.

136361609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268410.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 136361609 is about 11677.3973555754. The cubic root of 136361609 is about 514.7116983780.

The spelling of 136361609 in words is "one hundred thirty-six million, three hundred sixty-one thousand, six hundred nine".