133404217 has 2 divisors, whose sum is σ = 133404218. Its totient is φ = 133404216.

The previous prime is 133404143. The next prime is 133404221. The reversal of 133404217 is 712404331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105904681 + 27499536 = 10291^2 + 5244^2 .

It is a cyclic number.

It is not a de Polignac number, because 133404217 - 2¹¹ = 133402169 is a prime.

It is a super-2 number, since 2×133404217² = 35593370226766178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133404191 and 133404200.

It is not a weakly prime, because it can be changed into another prime (133404247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66702108 + 66702109.

It is an arithmetic number, because the mean of its divisors is an integer number (66702109).

Almost surely, 2^133404217 is an apocalyptic number.

It is an amenable number.

133404217 is a deficient number, since it is larger than the sum of its proper divisors (1).

133404217 is an equidigital number, since it uses as much as digits as its factorization.

133404217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 133404217 is about 11550.0743287652. The cubic root of 133404217 is about 510.9634702614.

Adding to 133404217 its reverse (712404331), we get a palindrome (845808548).

The spelling of 133404217 in words is "one hundred thirty-three million, four hundred four thousand, two hundred seventeen".