11281709 has 2 divisors, whose sum is σ = 11281710. Its totient is φ = 11281708.

The previous prime is 11281703. The next prime is 11281717. The reversal of 11281709 is 90718211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10220809 + 1060900 = 3197^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 11281709 - 2⁸ = 11281453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₇₄₃₈₇₀ and since 11281709 and 743870 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11281703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5640854 + 5640855.

It is an arithmetic number, because the mean of its divisors is an integer number (5640855).

Almost surely, 2^11281709 is an apocalyptic number.

It is an amenable number.

11281709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11281709 is an equidigital number, since it uses as much as digits as its factorization.

11281709 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 11281709 is about 3358.8255387858. The cubic root of 11281709 is about 224.2805596454.

The spelling of 11281709 in words is "eleven million, two hundred eighty-one thousand, seven hundred nine".