133055989 has 8 divisors (see below), whose sum is σ = 151463232. Its totient is φ = 115700640.

The previous prime is 133055971. The next prime is 133056017. The reversal of 133055989 is 989550331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133055989 - 2⁷ = 133055861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133055929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262704 + ... + 263209.

It is an arithmetic number, because the mean of its divisors is an integer number (18932904).

Almost surely, 2^133055989 is an apocalyptic number.

It is an amenable number.

133055989 is a deficient number, since it is larger than the sum of its proper divisors (18407243).

133055989 is a wasteful number, since it uses less digits than its factorization.

133055989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525947.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 133055989 is about 11534.9897702599. The cubic root of 133055989 is about 510.5184897453.

The spelling of 133055989 in words is "one hundred thirty-three million, fifty-five thousand, nine hundred eighty-nine".