133885447 has 2 divisors, whose sum is σ = 133885448. Its totient is φ = 133885446.

The previous prime is 133885397. The next prime is 133885501. The reversal of 133885447 is 744588331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133885447 - 2¹⁹ = 133361159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133885847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66942723 + 66942724.

It is an arithmetic number, because the mean of its divisors is an integer number (66942724).

Almost surely, 2^133885447 is an apocalyptic number.

133885447 is a deficient number, since it is larger than the sum of its proper divisors (1).

133885447 is an equidigital number, since it uses as much as digits as its factorization.

133885447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 43.

The square root of 133885447 is about 11570.8879088858. The cubic root of 133885447 is about 511.5771337056.

The spelling of 133885447 in words is "one hundred thirty-three million, eight hundred eighty-five thousand, four hundred forty-seven".