133447 has 2 divisors, whose sum is σ = 133448. Its totient is φ = 133446.

The previous prime is 133439. The next prime is 133451. The reversal of 133447 is 744331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133447 - 2³ = 133439 is a prime.

It is a Chen prime.

It is a plaindrome in base 10 and base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66723 + 66724.

It is an arithmetic number, because the mean of its divisors is an integer number (66724).

2¹³³⁴⁴⁷ is an apocalyptic number.

133447 is a deficient number, since it is larger than the sum of its proper divisors (1).

133447 is an equidigital number, since it uses as much as digits as its factorization.

133447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 22.

The square root of 133447 is about 365.3039830059. The cubic root of 133447 is about 51.1018086760.

Adding to 133447 its reverse (744331), we get a palindrome (877778).

The spelling of 133447 in words is "one hundred thirty-three thousand, four hundred forty-seven".