133710217 has 2 divisors, whose sum is σ = 133710218. Its totient is φ = 133710216.

The previous prime is 133710173. The next prime is 133710221. The reversal of 133710217 is 712017331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94070601 + 39639616 = 9699^2 + 6296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133710217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133710191 and 133710200.

It is not a weakly prime, because it can be changed into another prime (133710617) 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, 66855108 + 66855109.

It is an arithmetic number, because the mean of its divisors is an integer number (66855109).

Almost surely, 2^133710217 is an apocalyptic number.

It is an amenable number.

133710217 is a deficient number, since it is larger than the sum of its proper divisors (1).

133710217 is an equidigital number, since it uses as much as digits as its factorization.

133710217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 133710217 is about 11563.3134092266. The cubic root of 133710217 is about 511.3538512894.

Adding to 133710217 its reverse (712017331), we get a palindrome (845727548).

The spelling of 133710217 in words is "one hundred thirty-three million, seven hundred ten thousand, two hundred seventeen".