135311191 has 2 divisors, whose sum is σ = 135311192. Its totient is φ = 135311190.

The previous prime is 135311159. The next prime is 135311207. The reversal of 135311191 is 191113531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135311191 - 2⁵ = 135311159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135311101) 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, 67655595 + 67655596.

It is an arithmetic number, because the mean of its divisors is an integer number (67655596).

Almost surely, 2^135311191 is an apocalyptic number.

135311191 is a deficient number, since it is larger than the sum of its proper divisors (1).

135311191 is an equidigital number, since it uses as much as digits as its factorization.

135311191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405, while the sum is 25.

The square root of 135311191 is about 11632.3338586889. Note that the first 3 decimals coincide. The cubic root of 135311191 is about 513.3866512431.

It can be divided in two parts, 1353 and 11191, that added together give a square (12544 = 112²).

The spelling of 135311191 in words is "one hundred thirty-five million, three hundred eleven thousand, one hundred ninety-one".