11638197 has 6 divisors (see below), whose sum is σ = 16810742. Its totient is φ = 7758792.

The previous prime is 11638181. The next prime is 11638199. The reversal of 11638197 is 79183611.

11638197 is a `hidden beast` number, since 1 + 1 + 638 + 19 + 7 = 666.

11638197 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7986276 + 3651921 = 2826^2 + 1911^2 .

It is not a de Polignac number, because 11638197 - 2⁴ = 11638181 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 (11638199) 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 5 ways as a sum of consecutive naturals, for example, 646558 + ... + 646575.

Almost surely, 2^11638197 is an apocalyptic number.

It is an amenable number.

11638197 is a deficient number, since it is larger than the sum of its proper divisors (5172545).

11638197 is a wasteful number, since it uses less digits than its factorization.

11638197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293139 (or 1293136 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 11638197 is about 3411.4801772838. The cubic root of 11638197 is about 226.6184343260.

The spelling of 11638197 in words is "eleven million, six hundred thirty-eight thousand, one hundred ninety-seven".