2740217 has 2 divisors, whose sum is σ = 2740218. Its totient is φ = 2740216.

The previous prime is 2740211. The next prime is 2740219. The reversal of 2740217 is 7120472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2524921 + 215296 = 1589^2 + 464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2740217 is a prime.

Together with 2740219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2740192 and 2740201.

It is not a weakly prime, because it can be changed into another prime (2740211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370108 + 1370109.

It is an arithmetic number, because the mean of its divisors is an integer number (1370109).

2^2740217 is an apocalyptic number.

It is an amenable number.

2740217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740217 is an equidigital number, since it uses as much as digits as its factorization.

2740217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 2740217 is about 1655.3600816741. The cubic root of 2740217 is about 139.9356336768.

Adding to 2740217 its reverse (7120472), we get a palindrome (9860689).

The spelling of 2740217 in words is "two million, seven hundred forty thousand, two hundred seventeen".