133985889 has 12 divisors (see below), whose sum is σ = 195060736. Its totient is φ = 88619832.

The previous prime is 133985881. The next prime is 133985899. The reversal of 133985889 is 988589331.

It is not a de Polignac number, because 133985889 - 2³ = 133985881 is a prime.

It is a super-2 number, since 2×133985889² = 35904436902240642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133985881) 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 11 ways as a sum of consecutive naturals, for example, 57469 + ... + 59754.

Almost surely, 2^133985889 is an apocalyptic number.

It is an amenable number.

133985889 is a deficient number, since it is larger than the sum of its proper divisors (61074847).

133985889 is a wasteful number, since it uses less digits than its factorization.

133985889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117356 (or 117353 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 133985889 is about 11575.2273843757. The cubic root of 133985889 is about 511.7050315652.

It can be divided in two parts, 1 and 33985889, that added together give a triangular number (33985890 = T₈₂₄₄).

The spelling of 133985889 in words is "one hundred thirty-three million, nine hundred eighty-five thousand, eight hundred eighty-nine".