136693591 has 2 divisors, whose sum is σ = 136693592. Its totient is φ = 136693590.

The previous prime is 136693589. The next prime is 136693639. The reversal of 136693591 is 195396631.

136693591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136693591 - 2¹ = 136693589 is a prime.

Together with 136693589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136693541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68346795 + 68346796.

It is an arithmetic number, because the mean of its divisors is an integer number (68346796).

Almost surely, 2^136693591 is an apocalyptic number.

136693591 is a deficient number, since it is larger than the sum of its proper divisors (1).

136693591 is an equidigital number, since it uses as much as digits as its factorization.

136693591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 43.

The square root of 136693591 is about 11691.6034400761. The cubic root of 136693591 is about 515.1290605629.

The spelling of 136693591 in words is "one hundred thirty-six million, six hundred ninety-three thousand, five hundred ninety-one".