135694791 has 32 divisors (see below), whose sum is σ = 205309440. Its totient is φ = 88560000.

The previous prime is 135694777. The next prime is 135694817. The reversal of 135694791 is 197496531.

135694791 is a `hidden beast` number, since 13 + 569 + 4 + 79 + 1 = 666.

It is not a de Polignac number, because 135694791 - 2⁵ = 135694759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135694711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338191 + ... + 338591.

It is an arithmetic number, because the mean of its divisors is an integer number (6415920).

Almost surely, 2^135694791 is an apocalyptic number.

135694791 is a deficient number, since it is larger than the sum of its proper divisors (69614649).

135694791 is a wasteful number, since it uses less digits than its factorization.

135694791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 638 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 135694791 is about 11648.8107118281. The cubic root of 135694791 is about 513.8713347599.

The spelling of 135694791 in words is "one hundred thirty-five million, six hundred ninety-four thousand, seven hundred ninety-one".