2543917 has 2 divisors, whose sum is σ = 2543918. Its totient is φ = 2543916.

The previous prime is 2543899. The next prime is 2543921. The reversal of 2543917 is 7193452.

2543917 is digitally balanced in base 2, 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., 1331716 + 1212201 = 1154^2 + 1101^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543917 - 2¹⁵ = 2511149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543117) 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, 1271958 + 1271959.

It is an arithmetic number, because the mean of its divisors is an integer number (1271959).

2^2543917 is an apocalyptic number.

It is an amenable number.

2543917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543917 is an equidigital number, since it uses as much as digits as its factorization.

2543917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 2543917 is about 1594.9661438413. The cubic root of 2543917 is about 136.5109993060.

The spelling of 2543917 in words is "two million, five hundred forty-three thousand, nine hundred seventeen".