136256291 has 2 divisors, whose sum is σ = 136256292. Its totient is φ = 136256290.

The previous prime is 136256273. The next prime is 136256299. The reversal of 136256291 is 192652631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136256291 - 2¹⁰ = 136255267 is a prime.

It is not a weakly prime, because it can be changed into another prime (136256299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68128145 + 68128146.

It is an arithmetic number, because the mean of its divisors is an integer number (68128146).

Almost surely, 2^136256291 is an apocalyptic number.

136256291 is a deficient number, since it is larger than the sum of its proper divisors (1).

136256291 is an equidigital number, since it uses as much as digits as its factorization.

136256291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 136256291 is about 11672.8870036508. The cubic root of 136256291 is about 514.5791528400.

The spelling of 136256291 in words is "one hundred thirty-six million, two hundred fifty-six thousand, two hundred ninety-one".