133987564 has 12 divisors (see below), whose sum is σ = 237303864. Its totient is φ = 66186464.

The previous prime is 133987561. The next prime is 133987573. The reversal of 133987564 is 465789331.

It is not an unprimeable number, because it can be changed into a prime (133987561) 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 3 ways as a sum of consecutive naturals, for example, 201457 + ... + 202120.

It is an arithmetic number, because the mean of its divisors is an integer number (19775322).

Almost surely, 2^133987564 is an apocalyptic number.

It is an amenable number.

133987564 is a deficient number, since it is larger than the sum of its proper divisors (103316300).

133987564 is a wasteful number, since it uses less digits than its factorization.

133987564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403664 (or 403662 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 133987564 is about 11575.2997369399. The cubic root of 133987564 is about 511.7071638851.

The spelling of 133987564 in words is "one hundred thirty-three million, nine hundred eighty-seven thousand, five hundred sixty-four".