11717217 has 14 divisors (see below), whose sum is σ = 17568882. Its totient is φ = 7810992.

The previous prime is 11717213. The next prime is 11717219. The reversal of 11717217 is 71271711.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 3370896 = 2889^2 + 1836^2 .

It is not a de Polignac number, because 11717217 - 2² = 11717213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11717213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7308 + ... + 8765.

Almost surely, 2^11717217 is an apocalyptic number.

It is an amenable number.

11717217 is a deficient number, since it is larger than the sum of its proper divisors (5851665).

11717217 is an frugal number, since it uses more digits than its factorization.

11717217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16091 (or 16076 counting only the distinct ones).

The product of its digits is 686, while the sum is 27.

The square root of 11717217 is about 3423.0420681026. The cubic root of 11717217 is about 227.1301691535.

Adding to 11717217 its reverse (71271711), we get a palindrome (82988928).

The spelling of 11717217 in words is "eleven million, seven hundred seventeen thousand, two hundred seventeen".