135823191 has 16 divisors (see below), whose sum is σ = 217862400. Its totient is φ = 73528128.

The previous prime is 135823169. The next prime is 135823223. The reversal of 135823191 is 191328531.

It is not a de Polignac number, because 135823191 - 2⁵ = 135823159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135823151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169806 + ... + 170603.

It is an arithmetic number, because the mean of its divisors is an integer number (13616400).

Almost surely, 2^135823191 is an apocalyptic number.

135823191 is a deficient number, since it is larger than the sum of its proper divisors (82039209).

135823191 is a wasteful number, since it uses less digits than its factorization.

135823191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340438.

The product of its digits is 6480, while the sum is 33.

The square root of 135823191 is about 11654.3207009246. The cubic root of 135823191 is about 514.0333657377.

The spelling of 135823191 in words is "one hundred thirty-five million, eight hundred twenty-three thousand, one hundred ninety-one".