11556997 has 8 divisors (see below), whose sum is σ = 12200000. Its totient is φ = 10917504.

The previous prime is 11556983. The next prime is 11557037. The reversal of 11556997 is 79965511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11556997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8629 + ... + 9877.

It is an arithmetic number, because the mean of its divisors is an integer number (1525000).

Almost surely, 2^11556997 is an apocalyptic number.

It is an amenable number.

11556997 is a deficient number, since it is larger than the sum of its proper divisors (643003).

11556997 is a wasteful number, since it uses less digits than its factorization.

11556997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its digits is 85050, while the sum is 43.

The square root of 11556997 is about 3399.5583536689. The cubic root of 11556997 is about 226.0901629439.

The spelling of 11556997 in words is "eleven million, five hundred fifty-six thousand, nine hundred ninety-seven".