133896321 has 20 divisors (see below), whose sum is σ = 215405652. Its totient is φ = 82397088.

The previous prime is 133896319. The next prime is 133896331. The reversal of 133896321 is 123698331.

133896321 is a `hidden beast` number, since 13 + 3 + 8 + 9 + 632 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29550096 + 104346225 = 5436^2 + 10215^2 .

It is not a de Polignac number, because 133896321 - 2¹ = 133896319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133896331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62526 + ... + 64631.

Almost surely, 2^133896321 is an apocalyptic number.

It is an amenable number.

133896321 is a deficient number, since it is larger than the sum of its proper divisors (81509331).

133896321 is a wasteful number, since it uses less digits than its factorization.

133896321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127182 (or 127173 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 133896321 is about 11571.3577854978. The cubic root of 133896321 is about 511.5909832048.

The spelling of 133896321 in words is "one hundred thirty-three million, eight hundred ninety-six thousand, three hundred twenty-one".