136591193 has 4 divisors (see below), whose sum is σ = 137084580. Its totient is φ = 136097808.

The previous prime is 136591163. The next prime is 136591199. The reversal of 136591193 is 391195631.

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 6927424 + 129663769 = 2632^2 + 11387^2 .

It is a cyclic number.

It is not a de Polignac number, because 136591193 - 2¹² = 136587097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136591199) 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, 246278 + ... + 246831.

It is an arithmetic number, because the mean of its divisors is an integer number (34271145).

Almost surely, 2^136591193 is an apocalyptic number.

It is an amenable number.

136591193 is a deficient number, since it is larger than the sum of its proper divisors (493387).

136591193 is an equidigital number, since it uses as much as digits as its factorization.

136591193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493386.

The product of its digits is 21870, while the sum is 38.

The square root of 136591193 is about 11687.2234940554. The cubic root of 136591193 is about 515.0003996604. Note that the first 3 decimals are identical.

The spelling of 136591193 in words is "one hundred thirty-six million, five hundred ninety-one thousand, one hundred ninety-three".