133894387 has 16 divisors (see below), whose sum is σ = 155301120. Its totient is φ = 114156000.

The previous prime is 133894367. The next prime is 133894393. The reversal of 133894387 is 783498331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133894387 - 2⁷ = 133894259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133894307) 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 15 ways as a sum of consecutive naturals, for example, 17938 + ... + 24280.

It is an arithmetic number, because the mean of its divisors is an integer number (9706320).

Almost surely, 2^133894387 is an apocalyptic number.

133894387 is a deficient number, since it is larger than the sum of its proper divisors (21406733).

133894387 is a wasteful number, since it uses less digits than its factorization.

133894387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474.

The product of its digits is 435456, while the sum is 46.

The square root of 133894387 is about 11571.2742167836. The cubic root of 133894387 is about 511.5885200509.

The spelling of 133894387 in words is "one hundred thirty-three million, eight hundred ninety-four thousand, three hundred eighty-seven".