2078917 has 2 divisors, whose sum is σ = 2078918. Its totient is φ = 2078916.

The previous prime is 2078887. The next prime is 2078927. The reversal of 2078917 is 7198702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985281 + 93636 = 1409^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 2078917 - 2⁷ = 2078789 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2078927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039458 + 1039459.

It is an arithmetic number, because the mean of its divisors is an integer number (1039459).

2^2078917 is an apocalyptic number.

It is an amenable number.

2078917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078917 is an equidigital number, since it uses as much as digits as its factorization.

2078917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2078917 is about 1441.8449986042. The cubic root of 2078917 is about 127.6279274766.

The spelling of 2078917 in words is "two million, seventy-eight thousand, nine hundred seventeen".