11278117 has 2 divisors, whose sum is σ = 11278118. Its totient is φ = 11278116.

The previous prime is 11278097. The next prime is 11278139. The reversal of 11278117 is 71187211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6120676 + 5157441 = 2474^2 + 2271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11278117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11278147) 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, 5639058 + 5639059.

It is an arithmetic number, because the mean of its divisors is an integer number (5639059).

Almost surely, 2^11278117 is an apocalyptic number.

It is an amenable number.

11278117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11278117 is an equidigital number, since it uses as much as digits as its factorization.

11278117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 784, while the sum is 28.

The square root of 11278117 is about 3358.2907855038. The cubic root of 11278117 is about 224.2567541124.

The spelling of 11278117 in words is "eleven million, two hundred seventy-eight thousand, one hundred seventeen".