11680217 has 4 divisors (see below), whose sum is σ = 11688720. Its totient is φ = 11671716.

The previous prime is 11680213. The next prime is 11680237. The reversal of 11680217 is 71208611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11680217 - 2² = 11680213 is a prime.

It is a super-3 number, since 3×11680217³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11680213) 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 in 3 ways as a sum of consecutive naturals, for example, 1667 + ... + 5112.

It is an arithmetic number, because the mean of its divisors is an integer number (2922180).

Almost surely, 2^11680217 is an apocalyptic number.

It is an amenable number.

11680217 is a deficient number, since it is larger than the sum of its proper divisors (8503).

11680217 is an equidigital number, since it uses as much as digits as its factorization.

11680217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8502.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 11680217 is about 3417.6332453907. The cubic root of 11680217 is about 226.8908439076.

Adding to 11680217 its reverse (71208611), we get a palindrome (82888828).

The spelling of 11680217 in words is "eleven million, six hundred eighty thousand, two hundred seventeen".