133517717 has 2 divisors, whose sum is σ = 133517718. Its totient is φ = 133517716.

The previous prime is 133517639. The next prime is 133517723. The reversal of 133517717 is 717715331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133494916 + 22801 = 11554^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 133517717 - 2¹⁰ = 133516693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133517117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66758858 + 66758859.

It is an arithmetic number, because the mean of its divisors is an integer number (66758859).

Almost surely, 2^133517717 is an apocalyptic number.

It is an amenable number.

133517717 is a deficient number, since it is larger than the sum of its proper divisors (1).

133517717 is an equidigital number, since it uses as much as digits as its factorization.

133517717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15435, while the sum is 35.

The square root of 133517717 is about 11554.9866724285. The cubic root of 133517717 is about 511.1083380319.

The spelling of 133517717 in words is "one hundred thirty-three million, five hundred seventeen thousand, seven hundred seventeen".