133585887 has 4 divisors (see below), whose sum is σ = 178114520. Its totient is φ = 89057256.

The previous prime is 133585883. The next prime is 133585901. The reversal of 133585887 is 788585331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133585887 - 2² = 133585883 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 (133585883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22264312 + ... + 22264317.

It is an arithmetic number, because the mean of its divisors is an integer number (44528630).

Almost surely, 2^133585887 is an apocalyptic number.

133585887 is a deficient number, since it is larger than the sum of its proper divisors (44528633).

133585887 is an equidigital number, since it uses as much as digits as its factorization.

133585887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44528632.

The product of its digits is 806400, while the sum is 48.

The square root of 133585887 is about 11557.9361046858. The cubic root of 133585887 is about 511.1953085806.

The spelling of 133585887 in words is "one hundred thirty-three million, five hundred eighty-five thousand, eight hundred eighty-seven".