11028989 has 2 divisors, whose sum is σ = 11028990. Its totient is φ = 11028988.

The previous prime is 11028917. The next prime is 11029001. The reversal of 11028989 is 98982011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 466489 = 3250^2 + 683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11028989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11028289) 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, 5514494 + 5514495.

It is an arithmetic number, because the mean of its divisors is an integer number (5514495).

Almost surely, 2^11028989 is an apocalyptic number.

It is an amenable number.

11028989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11028989 is an equidigital number, since it uses as much as digits as its factorization.

11028989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 11028989 is about 3320.9921710236. The cubic root of 11028989 is about 222.5932042291.

The spelling of 11028989 in words is "eleven million, twenty-eight thousand, nine hundred eighty-nine".