11985197 has 4 divisors (see below), whose sum is σ = 13697376. Its totient is φ = 10273020.

The previous prime is 11985191. The next prime is 11985199. The reversal of 11985197 is 79158911.

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 an emirpimes, since its reverse is a distinct semiprime: 79158911 = 13 ⋅6089147.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11985197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11985191) 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, 856079 + ... + 856092.

It is an arithmetic number, because the mean of its divisors is an integer number (3424344).

Almost surely, 2^11985197 is an apocalyptic number.

It is an amenable number.

11985197 is a deficient number, since it is larger than the sum of its proper divisors (1712179).

11985197 is an equidigital number, since it uses as much as digits as its factorization.

11985197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712178.

The product of its digits is 22680, while the sum is 41.

The square root of 11985197 is about 3461.9643267948. The cubic root of 11985197 is about 228.8486697469.

The spelling of 11985197 in words is "eleven million, nine hundred eighty-five thousand, one hundred ninety-seven".