11391489 has 8 divisors (see below), whose sum is σ = 16876320. Its totient is φ = 7594308.

The previous prime is 11391473. The next prime is 11391511. The reversal of 11391489 is 98419311.

It is not a de Polignac number, because 11391489 - 2⁴ = 11391473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11393489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210927 + ... + 210980.

It is an arithmetic number, because the mean of its divisors is an integer number (2109540).

Almost surely, 2^11391489 is an apocalyptic number.

It is an amenable number.

11391489 is a deficient number, since it is larger than the sum of its proper divisors (5484831).

11391489 is an equidigital number, since it uses as much as digits as its factorization.

11391489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421916 (or 421910 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 11391489 is about 3375.1279975728. The cubic root of 11391489 is about 225.0056887451.

It can be divided in two parts, 113914 and 89, that added together give a triangular number (114003 = T₄₇₇).

The spelling of 11391489 in words is "eleven million, three hundred ninety-one thousand, four hundred eighty-nine".