136605593 has 4 divisors (see below), whose sum is σ = 137313588. Its totient is φ = 135897600.

The previous prime is 136605589. The next prime is 136605607. The reversal of 136605593 is 395506631.

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 49519369 + 87086224 = 7037^2 + 9332^2 .

It is a cyclic number.

It is not a de Polignac number, because 136605593 - 2² = 136605589 is a prime.

It is a super-2 number, since 2×136605593² = 37322176077763298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136605583) 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, 353708 + ... + 354093.

It is an arithmetic number, because the mean of its divisors is an integer number (34328397).

Almost surely, 2^136605593 is an apocalyptic number.

It is an amenable number.

136605593 is a deficient number, since it is larger than the sum of its proper divisors (707995).

136605593 is an equidigital number, since it uses as much as digits as its factorization.

136605593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707994.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 136605593 is about 11687.8395351750. The cubic root of 136605593 is about 515.0184968378.

The spelling of 136605593 in words is "one hundred thirty-six million, six hundred five thousand, five hundred ninety-three".