135571947 has 16 divisors (see below), whose sum is σ = 206748672. Its totient is φ = 77408640.

The previous prime is 135571939. The next prime is 135571949. The reversal of 135571947 is 749175531.

It is not a de Polignac number, because 135571947 - 2³ = 135571939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135571899 and 135571908.

It is not an unprimeable number, because it can be changed into a prime (135571949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49422 + ... + 52092.

It is an arithmetic number, because the mean of its divisors is an integer number (12921792).

Almost surely, 2^135571947 is an apocalyptic number.

135571947 is a deficient number, since it is larger than the sum of its proper divisors (71176725).

135571947 is a wasteful number, since it uses less digits than its factorization.

135571947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098.

The product of its digits is 132300, while the sum is 42.

The square root of 135571947 is about 11643.5367049707. The cubic root of 135571947 is about 513.7162193262.

The spelling of 135571947 in words is "one hundred thirty-five million, five hundred seventy-one thousand, nine hundred forty-seven".