917133217 has 16 divisors (see below), whose sum is σ = 1231396992. Its totient is φ = 659675520.

The previous prime is 917133209. The next prime is 917133263. The reversal of 917133217 is 712331719.

It is not a de Polignac number, because 917133217 - 2³ = 917133209 is a prime.

It is a super-2 number, since 2×917133217² = 1682266675449538178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (917133277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457108 + ... + 459109.

It is an arithmetic number, because the mean of its divisors is an integer number (76962312).

Almost surely, 2^917133217 is an apocalyptic number.

It is an amenable number.

917133217 is a deficient number, since it is larger than the sum of its proper divisors (314263775).

917133217 is a wasteful number, since it uses less digits than its factorization.

917133217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916248.

The product of its digits is 7938, while the sum is 34.

The square root of 917133217 is about 30284.2073860288. The cubic root of 917133217 is about 971.5775573014.

The spelling of 917133217 in words is "nine hundred seventeen million, one hundred thirty-three thousand, two hundred seventeen".