133538487 has 8 divisors (see below), whose sum is σ = 178119936. Its totient is φ = 88991352.

The previous prime is 133538459. The next prime is 133538497. The reversal of 133538487 is 784835331.

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

It is not a de Polignac number, because 133538487 - 2¹⁰ = 133537463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133538497) 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, 2578 + ... + 16544.

It is an arithmetic number, because the mean of its divisors is an integer number (22264992).

Almost surely, 2^133538487 is an apocalyptic number.

133538487 is a deficient number, since it is larger than the sum of its proper divisors (44581449).

133538487 is a wasteful number, since it uses less digits than its factorization.

133538487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17157.

The product of its digits is 241920, while the sum is 42.

The square root of 133538487 is about 11555.8853836476. The cubic root of 133538487 is about 511.1348393083.

The spelling of 133538487 in words is "one hundred thirty-three million, five hundred thirty-eight thousand, four hundred eighty-seven".