135533191 has 2 divisors, whose sum is σ = 135533192. Its totient is φ = 135533190.

The previous prime is 135533179. The next prime is 135533263. The reversal of 135533191 is 191335531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135533191 - 2⁵ = 135533159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135533491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67766595 + 67766596.

It is an arithmetic number, because the mean of its divisors is an integer number (67766596).

Almost surely, 2^135533191 is an apocalyptic number.

135533191 is a deficient number, since it is larger than the sum of its proper divisors (1).

135533191 is an equidigital number, since it uses as much as digits as its factorization.

135533191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6075, while the sum is 31.

The square root of 135533191 is about 11641.8723150531. The cubic root of 135533191 is about 513.6672625823.

The spelling of 135533191 in words is "one hundred thirty-five million, five hundred thirty-three thousand, one hundred ninety-one".