11986897 has 4 divisors (see below), whose sum is σ = 12908980. Its totient is φ = 11064816.

The previous prime is 11986879. The next prime is 11986913. The reversal of 11986897 is 79868911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79868911 = 281 ⋅284231.

It can be written as a sum of positive squares in 2 ways, for example, as 5716881 + 6270016 = 2391^2 + 2504^2 .

It is a cyclic number.

It is not a de Polignac number, because 11986897 - 2¹¹ = 11984849 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 11986897.

It is not an unprimeable number, because it can be changed into a prime (11986837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461022 + ... + 461047.

It is an arithmetic number, because the mean of its divisors is an integer number (3227245).

Almost surely, 2^11986897 is an apocalyptic number.

It is an amenable number.

11986897 is a deficient number, since it is larger than the sum of its proper divisors (922083).

11986897 is an equidigital number, since it uses as much as digits as its factorization.

11986897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922082.

The product of its digits is 217728, while the sum is 49.

The square root of 11986897 is about 3462.2098434381. The cubic root of 11986897 is about 228.8594893255.

The spelling of 11986897 in words is "eleven million, nine hundred eighty-six thousand, eight hundred ninety-seven".