11387917 has 2 divisors, whose sum is σ = 11387918. Its totient is φ = 11387916.

The previous prime is 11387899. The next prime is 11387933. The reversal of 11387917 is 71978311.

11387917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7678441 + 3709476 = 2771^2 + 1926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11387917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11387947) 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, 5693958 + 5693959.

It is an arithmetic number, because the mean of its divisors is an integer number (5693959).

Almost surely, 2^11387917 is an apocalyptic number.

It is an amenable number.

11387917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11387917 is an equidigital number, since it uses as much as digits as its factorization.

11387917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 37.

The square root of 11387917 is about 3374.5987909676. The cubic root of 11387917 is about 224.9821681341.

The spelling of 11387917 in words is "eleven million, three hundred eighty-seven thousand, nine hundred seventeen".