136815559 has 2 divisors, whose sum is σ = 136815560. Its totient is φ = 136815558.

The previous prime is 136815557. The next prime is 136815571. The reversal of 136815559 is 955518631.

136815559 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 136815559 - 2¹ = 136815557 is a prime.

Together with 136815557, 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 (136815557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68407779 + 68407780.

It is an arithmetic number, because the mean of its divisors is an integer number (68407780).

Almost surely, 2^136815559 is an apocalyptic number.

136815559 is a deficient number, since it is larger than the sum of its proper divisors (1).

136815559 is an equidigital number, since it uses as much as digits as its factorization.

136815559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 43.

The square root of 136815559 is about 11696.8183280754. The cubic root of 136815559 is about 515.2822269333.

The spelling of 136815559 in words is "one hundred thirty-six million, eight hundred fifteen thousand, five hundred fifty-nine".