136724191 has 2 divisors, whose sum is σ = 136724192. Its totient is φ = 136724190.

The previous prime is 136724177. The next prime is 136724207. The reversal of 136724191 is 191427631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136724191 - 2⁹ = 136723679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136724131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68362095 + 68362096.

It is an arithmetic number, because the mean of its divisors is an integer number (68362096).

Almost surely, 2^136724191 is an apocalyptic number.

136724191 is a deficient number, since it is larger than the sum of its proper divisors (1).

136724191 is an equidigital number, since it uses as much as digits as its factorization.

136724191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 136724191 is about 11692.9119983005. The cubic root of 136724191 is about 515.1674963399.

The spelling of 136724191 in words is "one hundred thirty-six million, seven hundred twenty-four thousand, one hundred ninety-one".