11243989 has 2 divisors, whose sum is σ = 11243990. Its totient is φ = 11243988.

The previous prime is 11243983. The next prime is 11244011. The reversal of 11243989 is 98934211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9199089 + 2044900 = 3033^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 11243989 - 2⁵ = 11243957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11243983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621994 + 5621995.

It is an arithmetic number, because the mean of its divisors is an integer number (5621995).

Almost surely, 2^11243989 is an apocalyptic number.

It is an amenable number.

11243989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11243989 is an equidigital number, since it uses as much as digits as its factorization.

11243989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 11243989 is about 3353.2057795489. The cubic root of 11243989 is about 224.0303224789.

The spelling of 11243989 in words is "eleven million, two hundred forty-three thousand, nine hundred eighty-nine".