136693609 has 4 divisors (see below), whose sum is σ = 147208516. Its totient is φ = 126178704.

The previous prime is 136693591. The next prime is 136693639. The reversal of 136693609 is 906396631.

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 47334400 + 89359209 = 6880^2 + 9453^2 .

It is a cyclic number.

It is not a de Polignac number, because 136693609 - 2²¹ = 134596457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136693639) 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, 5257434 + ... + 5257459.

It is an arithmetic number, because the mean of its divisors is an integer number (36802129).

Almost surely, 2^136693609 is an apocalyptic number.

It is an amenable number.

136693609 is a deficient number, since it is larger than the sum of its proper divisors (10514907).

136693609 is a wasteful number, since it uses less digits than its factorization.

136693609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10514906.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 136693609 is about 11691.6042098593. The cubic root of 136693609 is about 515.1290831738.

The spelling of 136693609 in words is "one hundred thirty-six million, six hundred ninety-three thousand, six hundred nine".