136105591 has 2 divisors, whose sum is σ = 136105592. Its totient is φ = 136105590.

The previous prime is 136105589. The next prime is 136105633. The reversal of 136105591 is 195501631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136105591 - 2¹ = 136105589 is a prime.

Together with 136105589, 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 (136102591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68052795 + 68052796.

It is an arithmetic number, because the mean of its divisors is an integer number (68052796).

Almost surely, 2^136105591 is an apocalyptic number.

136105591 is a deficient number, since it is larger than the sum of its proper divisors (1).

136105591 is an equidigital number, since it uses as much as digits as its factorization.

136105591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 136105591 is about 11666.4300880775. The cubic root of 136105591 is about 514.3893739939.

The spelling of 136105591 in words is "one hundred thirty-six million, one hundred five thousand, five hundred ninety-one".