11199989 has 2 divisors, whose sum is σ = 11199990. Its totient is φ = 11199988.

The previous prime is 11199977. The next prime is 11200001. The reversal of 11199989 is 98999111.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (11199977) and next prime (11200001).

It can be written as a sum of positive squares in only one way, i.e., 10080625 + 1119364 = 3175^2 + 1058^2 .

It is an emirp because it is prime and its reverse (98999111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11199989 - 2⁴ = 11199973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11199389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599994 + 5599995.

It is an arithmetic number, because the mean of its divisors is an integer number (5599995).

Almost surely, 2^11199989 is an apocalyptic number.

It is an amenable number.

11199989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11199989 is an equidigital number, since it uses as much as digits as its factorization.

11199989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 47.

The square root of 11199989 is about 3346.6384626966. The cubic root of 11199989 is about 223.7377151688.

The spelling of 11199989 in words is "eleven million, one hundred ninety-nine thousand, nine hundred eighty-nine".