11499989 has 2 divisors, whose sum is σ = 11499990. Its totient is φ = 11499988.

The previous prime is 11499953. The next prime is 11499991. The reversal of 11499989 is 98999411.

11499989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 1067089 = 3230^2 + 1033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11499989 is a prime.

It is a Sophie Germain prime.

Together with 11499991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11499949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5749994 + 5749995.

It is an arithmetic number, because the mean of its divisors is an integer number (5749995).

Almost surely, 2^11499989 is an apocalyptic number.

It is an amenable number.

11499989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11499989 is an equidigital number, since it uses as much as digits as its factorization.

11499989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 50.

The square root of 11499989 is about 3391.1633697007. The cubic root of 11499989 is about 225.7177998057.

The spelling of 11499989 in words is "eleven million, four hundred ninety-nine thousand, nine hundred eighty-nine".