11993917 has 8 divisors (see below), whose sum is σ = 12993624. Its totient is φ = 11005248.

The previous prime is 11993911. The next prime is 11993963. The reversal of 11993917 is 71939911.

It can be written as a sum of positive squares in 4 ways, for example, as 6205081 + 5788836 = 2491^2 + 2406^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11993917 - 2³ = 11993909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11993917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993911) 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 7 ways as a sum of consecutive naturals, for example, 418 + ... + 4915.

It is an arithmetic number, because the mean of its divisors is an integer number (1624203).

Almost surely, 2^11993917 is an apocalyptic number.

It is an amenable number.

11993917 is a deficient number, since it is larger than the sum of its proper divisors (999707).

11993917 is a wasteful number, since it uses less digits than its factorization.

11993917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519.

The product of its digits is 15309, while the sum is 40.

The square root of 11993917 is about 3463.2234984188. The cubic root of 11993917 is about 228.9041569903.

The spelling of 11993917 in words is "eleven million, nine hundred ninety-three thousand, nine hundred seventeen".