133210817 has 2 divisors, whose sum is σ = 133210818. Its totient is φ = 133210816.

The previous prime is 133210801. The next prime is 133210823. The reversal of 133210817 is 718012331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91853056 + 41357761 = 9584^2 + 6431^2 .

It is an emirp because it is prime and its reverse (718012331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133210817 - 2⁴ = 133210801 is a prime.

It is not a weakly prime, because it can be changed into another prime (133210837) 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, 66605408 + 66605409.

It is an arithmetic number, because the mean of its divisors is an integer number (66605409).

Almost surely, 2^133210817 is an apocalyptic number.

It is an amenable number.

133210817 is a deficient number, since it is larger than the sum of its proper divisors (1).

133210817 is an equidigital number, since it uses as much as digits as its factorization.

133210817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 133210817 is about 11541.6990516995. The cubic root of 133210817 is about 510.7164312744.

The spelling of 133210817 in words is "one hundred thirty-three million, two hundred ten thousand, eight hundred seventeen".