133788771 has 6 divisors (see below), whose sum is σ = 193250460. Its totient is φ = 89192508.

The previous prime is 133788763. The next prime is 133788797. The reversal of 133788771 is 177887331.

It is not a de Polignac number, because 133788771 - 2³ = 133788763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133788701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7432701 + ... + 7432718.

It is an arithmetic number, because the mean of its divisors is an integer number (32208410).

Almost surely, 2^133788771 is an apocalyptic number.

133788771 is a deficient number, since it is larger than the sum of its proper divisors (59461689).

133788771 is a wasteful number, since it uses less digits than its factorization.

133788771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14865425 (or 14865422 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 133788771 is about 11566.7096012652. The cubic root of 133788771 is about 511.4539708554.

The spelling of 133788771 in words is "one hundred thirty-three million, seven hundred eighty-eight thousand, seven hundred seventy-one".