11128709 has 2 divisors, whose sum is σ = 11128710. Its totient is φ = 11128708.

The previous prime is 11128697. The next prime is 11128739. The reversal of 11128709 is 90782111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11035684 + 93025 = 3322^2 + 305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11128709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11128739) 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, 5564354 + 5564355.

It is an arithmetic number, because the mean of its divisors is an integer number (5564355).

Almost surely, 2^11128709 is an apocalyptic number.

It is an amenable number.

11128709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11128709 is an equidigital number, since it uses as much as digits as its factorization.

11128709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 11128709 is about 3335.9719723043. The cubic root of 11128709 is about 223.2620606213.

The spelling of 11128709 in words is "eleven million, one hundred twenty-eight thousand, seven hundred nine".