11709217 has 8 divisors (see below), whose sum is σ = 12692456. Its totient is φ = 10737792.

The previous prime is 11709197. The next prime is 11709223. The reversal of 11709217 is 71290711.

It can be written as a sum of positive squares in 4 ways, for example, as 746496 + 10962721 = 864^2 + 3311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11709217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11709517) 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 7 ways as a sum of consecutive naturals, for example, 828 + ... + 4909.

It is an arithmetic number, because the mean of its divisors is an integer number (1586557).

Almost surely, 2^11709217 is an apocalyptic number.

It is an amenable number.

11709217 is a deficient number, since it is larger than the sum of its proper divisors (983239).

11709217 is a wasteful number, since it uses less digits than its factorization.

11709217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 11709217 is about 3421.8733173512. The cubic root of 11709217 is about 227.0784658909.

Adding to 11709217 its reverse (71290711), we get a palindrome (82999928).

The spelling of 11709217 in words is "eleven million, seven hundred nine thousand, two hundred seventeen".