133218347 has 2 divisors, whose sum is σ = 133218348. Its totient is φ = 133218346.

The previous prime is 133218289. The next prime is 133218359. The reversal of 133218347 is 743812331.

It is a strong prime.

It is an emirp because it is prime and its reverse (743812331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133218347 - 2¹⁸ = 132956203 is a prime.

It is equal to p_7550285 and since 133218347 and 7550285 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133218947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66609173 + 66609174.

It is an arithmetic number, because the mean of its divisors is an integer number (66609174).

Almost surely, 2^133218347 is an apocalyptic number.

133218347 is a deficient number, since it is larger than the sum of its proper divisors (1).

133218347 is an equidigital number, since it uses as much as digits as its factorization.

133218347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 133218347 is about 11542.0252555607. The cubic root of 133218347 is about 510.7260541723.

The spelling of 133218347 in words is "one hundred thirty-three million, two hundred eighteen thousand, three hundred forty-seven".