135784791 has 12 divisors (see below), whose sum is σ = 197546440. Its totient is φ = 89871120.

The previous prime is 135784741. The next prime is 135784823. The reversal of 135784791 is 197487531.

135784791 is a `hidden beast` number, since 1 + 3 + 578 + 4 + 79 + 1 = 666.

It is not a de Polignac number, because 135784791 - 2¹⁴ = 135768407 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 (135784741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53020 + ... + 55521.

Almost surely, 2^135784791 is an apocalyptic number.

135784791 is a deficient number, since it is larger than the sum of its proper divisors (61761649).

135784791 is a wasteful number, since it uses less digits than its factorization.

135784791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108686 (or 108683 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 135784791 is about 11652.6731267980. The cubic root of 135784791 is about 513.9849185823.

The spelling of 135784791 in words is "one hundred thirty-five million, seven hundred eighty-four thousand, seven hundred ninety-one".