135143191 has 2 divisors, whose sum is σ = 135143192. Its totient is φ = 135143190.

The previous prime is 135143159. The next prime is 135143227. The reversal of 135143191 is 191341531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135143191 - 2⁵ = 135143159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135143131) 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, 67571595 + 67571596.

It is an arithmetic number, because the mean of its divisors is an integer number (67571596).

Almost surely, 2^135143191 is an apocalyptic number.

135143191 is a deficient number, since it is larger than the sum of its proper divisors (1).

135143191 is an equidigital number, since it uses as much as digits as its factorization.

135143191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 135143191 is about 11625.1103650675. The cubic root of 135143191 is about 513.1740926304.

The spelling of 135143191 in words is "one hundred thirty-five million, one hundred forty-three thousand, one hundred ninety-one".