11519989 has 8 divisors (see below), whose sum is σ = 12834360. Its totient is φ = 10266816.

The previous prime is 11519983. The next prime is 11520013. The reversal of 11519989 is 98991511.

It can be written as a sum of positive squares in 4 ways, for example, as 27889 + 11492100 = 167^2 + 3390^2 .

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 11519989 - 2⁹ = 11519477 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 (11519983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14902 + ... + 15655.

It is an arithmetic number, because the mean of its divisors is an integer number (1604295).

Almost surely, 2^11519989 is an apocalyptic number.

It is an amenable number.

11519989 is a deficient number, since it is larger than the sum of its proper divisors (1314371).

11519989 is a wasteful number, since it uses less digits than its factorization.

11519989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30599.

The product of its digits is 29160, while the sum is 43.

The square root of 11519989 is about 3394.1109292420. The cubic root of 11519989 is about 225.8485750467.

The spelling of 11519989 in words is "eleven million, five hundred nineteen thousand, nine hundred eighty-nine".