135693571 has 4 divisors (see below), whose sum is σ = 146131552. Its totient is φ = 125255592.

The previous prime is 135693557. The next prime is 135693589. The reversal of 135693571 is 175396531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175396531 = 17 ⋅10317443.

It is a cyclic number.

It is not a de Polignac number, because 135693571 - 2¹⁹ = 135169283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135693511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5218971 + ... + 5218996.

It is an arithmetic number, because the mean of its divisors is an integer number (36532888).

Almost surely, 2^135693571 is an apocalyptic number.

135693571 is a deficient number, since it is larger than the sum of its proper divisors (10437981).

135693571 is a wasteful number, since it uses less digits than its factorization.

135693571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437980.

The product of its digits is 85050, while the sum is 40.

The square root of 135693571 is about 11648.7583458496. The cubic root of 135693571 is about 513.8697947232.

The spelling of 135693571 in words is "one hundred thirty-five million, six hundred ninety-three thousand, five hundred seventy-one".