133642647 has 6 divisors (see below), whose sum is σ = 193039392. Its totient is φ = 89095092.

The previous prime is 133642591. The next prime is 133642651. The reversal of 133642647 is 746246331.

It is a happy number.

133642647 is a `hidden beast` number, since 1 + 3 + 3 + 6 + 4 + 2 + 647 = 666.

It is not a de Polignac number, because 133642647 - 2¹⁰ = 133641623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133641647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7424583 + ... + 7424600.

It is an arithmetic number, because the mean of its divisors is an integer number (32173232).

Almost surely, 2^133642647 is an apocalyptic number.

133642647 is a deficient number, since it is larger than the sum of its proper divisors (59396745).

133642647 is a wasteful number, since it uses less digits than its factorization.

133642647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14849189 (or 14849186 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 133642647 is about 11560.3912996057. The cubic root of 133642647 is about 511.2676998035.

Adding to 133642647 its reverse (746246331), we get a palindrome (879888978).

The spelling of 133642647 in words is "one hundred thirty-three million, six hundred forty-two thousand, six hundred forty-seven".