11861197 has 2 divisors, whose sum is σ = 11861198. Its totient is φ = 11861196.

The previous prime is 11861191. The next prime is 11861219. The reversal of 11861197 is 79116811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11417641 + 443556 = 3379^2 + 666^2 .

It is an emirp because it is prime and its reverse (79116811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11861197 - 2¹⁵ = 11828429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11861191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5930598 + 5930599.

It is an arithmetic number, because the mean of its divisors is an integer number (5930599).

Almost surely, 2^11861197 is an apocalyptic number.

It is an amenable number.

11861197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11861197 is an equidigital number, since it uses as much as digits as its factorization.

11861197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 34.

The square root of 11861197 is about 3444.0088559700. The cubic root of 11861197 is about 228.0567020665.

The spelling of 11861197 in words is "eleven million, eight hundred sixty-one thousand, one hundred ninety-seven".