133966447 has 4 divisors (see below), whose sum is σ = 133989856. Its totient is φ = 133943040.

The previous prime is 133966423. The next prime is 133966453. The reversal of 133966447 is 744669331.

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

It is a cyclic number.

It is not a de Polignac number, because 133966447 - 2⁷ = 133966319 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 (133967447) 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, 3247 + ... + 16687.

It is an arithmetic number, because the mean of its divisors is an integer number (33497464).

Almost surely, 2^133966447 is an apocalyptic number.

133966447 is a deficient number, since it is larger than the sum of its proper divisors (23409).

133966447 is an equidigital number, since it uses as much as digits as its factorization.

133966447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23408.

The product of its digits is 326592, while the sum is 43.

The square root of 133966447 is about 11574.3875431921. The cubic root of 133966447 is about 511.6802800770.

The spelling of 133966447 in words is "one hundred thirty-three million, nine hundred sixty-six thousand, four hundred forty-seven".