135466191 has 24 divisors (see below), whose sum is σ = 224092544. Its totient is φ = 77248080.

The previous prime is 135466189. The next prime is 135466193. The reversal of 135466191 is 191664531.

135466191 is a `hidden beast` number, since 1 + 3 + 5 + 466 + 191 = 666.

It is an interprime number because it is at equal distance from previous prime (135466189) and next prime (135466193).

It is not a de Polignac number, because 135466191 - 2¹ = 135466189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135466193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32496 + ... + 36426.

Almost surely, 2^135466191 is an apocalyptic number.

135466191 is a deficient number, since it is larger than the sum of its proper divisors (88626353).

135466191 is a wasteful number, since it uses less digits than its factorization.

135466191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491 (or 4488 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 135466191 is about 11638.9944153264. The cubic root of 135466191 is about 513.5826058795.

The spelling of 135466191 in words is "one hundred thirty-five million, four hundred sixty-six thousand, one hundred ninety-one".