133540989 has 8 divisors (see below), whose sum is σ = 180562752. Its totient is φ = 87773280.

The previous prime is 133540961. The next prime is 133540991. The reversal of 133540989 is 989045331.

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

It is not a de Polignac number, because 133540989 - 2¹¹ = 133538941 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 133540989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133540919) 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 7 ways as a sum of consecutive naturals, for example, 313264 + ... + 313689.

It is an arithmetic number, because the mean of its divisors is an integer number (22570344).

Almost surely, 2^133540989 is an apocalyptic number.

It is an amenable number.

133540989 is a deficient number, since it is larger than the sum of its proper divisors (47021763).

133540989 is an equidigital number, since it uses as much as digits as its factorization.

133540989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627027.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 133540989 is about 11555.9936396660. The cubic root of 133540989 is about 511.1380315251.

It can be divided in two parts, 1335 and 40989, that added together give a palindrome (42324).

The spelling of 133540989 in words is "one hundred thirty-three million, five hundred forty thousand, nine hundred eighty-nine".