11831197 has 6 divisors (see below), whose sum is σ = 13762878. Its totient is φ = 10140984.

The previous prime is 11831123. The next prime is 11831219. The reversal of 11831197 is 79113811.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 682276 = 3339^2 + 826^2 .

It is not a de Polignac number, because 11831197 - 2¹¹ = 11829149 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 (11831117) 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, 120678 + ... + 120775.

It is an arithmetic number, because the mean of its divisors is an integer number (2293813).

Almost surely, 2^11831197 is an apocalyptic number.

It is an amenable number.

11831197 is a deficient number, since it is larger than the sum of its proper divisors (1931681).

11831197 is an equidigital number, since it uses as much as digits as its factorization.

11831197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241467 (or 241460 counting only the distinct ones).

The product of its digits is 1512, while the sum is 31.

The square root of 11831197 is about 3439.6507090110. The cubic root of 11831197 is about 227.8642685002.

The spelling of 11831197 in words is "eleven million, eight hundred thirty-one thousand, one hundred ninety-seven".