11281913 has 2 divisors, whose sum is σ = 11281914. Its totient is φ = 11281912.

The previous prime is 11281909. The next prime is 11281961. The reversal of 11281913 is 31918211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7907344 + 3374569 = 2812^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 11281913 - 2² = 11281909 is a prime.

It is not a weakly prime, because it can be changed into another prime (11281903) 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, 5640956 + 5640957.

It is an arithmetic number, because the mean of its divisors is an integer number (5640957).

Almost surely, 2^11281913 is an apocalyptic number.

It is an amenable number.

11281913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11281913 is an equidigital number, since it uses as much as digits as its factorization.

11281913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 26.

The square root of 11281913 is about 3358.8559064062. The cubic root of 11281913 is about 224.2819114783.

The spelling of 11281913 in words is "eleven million, two hundred eighty-one thousand, nine hundred thirteen".