11111489 has 4 divisors (see below), whose sum is σ = 11765124. Its totient is φ = 10457856.

The previous prime is 11111431. The next prime is 11111491. The reversal of 11111489 is 98411111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98411111 = 41 ⋅2400271.

It can be written as a sum of positive squares in 2 ways, for example, as 5313025 + 5798464 = 2305^2 + 2408^2 .

It is not a de Polignac number, because 11111489 - 2¹⁶ = 11045953 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11113489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326792 + ... + 326825.

It is an arithmetic number, because the mean of its divisors is an integer number (2941281).

Almost surely, 2^11111489 is an apocalyptic number.

It is an amenable number.

11111489 is a deficient number, since it is larger than the sum of its proper divisors (653635).

11111489 is an equidigital number, since it uses as much as digits as its factorization.

11111489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653634.

The product of its digits is 288, while the sum is 26.

The square root of 11111489 is about 3333.3900161847. The cubic root of 11111489 is about 223.1468463781.

The spelling of 11111489 in words is "eleven million, one hundred eleven thousand, four hundred eighty-nine".