11997289 has 8 divisors (see below), whose sum is σ = 12221280. Its totient is φ = 11775456.

The previous prime is 11997277. The next prime is 11997299. The reversal of 11997289 is 98279911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11997289 - 2¹⁵ = 11964521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11997269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14094 + ... + 14920.

It is an arithmetic number, because the mean of its divisors is an integer number (1527660).

Almost surely, 2^11997289 is an apocalyptic number.

It is an amenable number.

11997289 is a deficient number, since it is larger than the sum of its proper divisors (223991).

11997289 is an equidigital number, since it uses as much as digits as its factorization.

11997289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its digits is 81648, while the sum is 46.

The square root of 11997289 is about 3463.7102938901. The cubic root of 11997289 is about 228.9256065438.

The spelling of 11997289 in words is "eleven million, nine hundred ninety-seven thousand, two hundred eighty-nine".