11289997 has 4 divisors (see below), whose sum is σ = 11371360. Its totient is φ = 11208636.

The previous prime is 11289979. The next prime is 11290003. The reversal of 11289997 is 79998211.

It is a happy number.

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 not a de Polignac number, because 11289997 - 2¹⁵ = 11257229 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 (11289907) 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 3 ways as a sum of consecutive naturals, for example, 40473 + ... + 40750.

It is an arithmetic number, because the mean of its divisors is an integer number (2842840).

Almost surely, 2^11289997 is an apocalyptic number.

It is an amenable number.

11289997 is a deficient number, since it is larger than the sum of its proper divisors (81363).

11289997 is an equidigital number, since it uses as much as digits as its factorization.

11289997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81362.

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

The square root of 11289997 is about 3360.0590768616. The cubic root of 11289997 is about 224.3354680602.

It can be divided in two parts, 112 and 89997, that added together give a palindrome (90109).

The spelling of 11289997 in words is "eleven million, two hundred eighty-nine thousand, nine hundred ninety-seven".