11841997 has 4 divisors (see below), whose sum is σ = 12465280. Its totient is φ = 11218716.

The previous prime is 11841971. The next prime is 11842001. The reversal of 11841997 is 79914811.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11841997 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 (11841917) 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, 311613 + ... + 311650.

It is an arithmetic number, because the mean of its divisors is an integer number (3116320).

Almost surely, 2^11841997 is an apocalyptic number.

It is an amenable number.

11841997 is a deficient number, since it is larger than the sum of its proper divisors (623283).

11841997 is an equidigital number, since it uses as much as digits as its factorization.

11841997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623282.

The product of its digits is 18144, while the sum is 40.

The square root of 11841997 is about 3441.2202777503. The cubic root of 11841997 is about 227.9335820184.

The spelling of 11841997 in words is "eleven million, eight hundred forty-one thousand, nine hundred ninety-seven".