2782217 has 2 divisors, whose sum is σ = 2782218. Its totient is φ = 2782216.

The previous prime is 2782211. The next prime is 2782279. The reversal of 2782217 is 7122872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 866761 = 1384^2 + 931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782217 - 2⁴ = 2782201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2782217.

It is not a weakly prime, because it can be changed into another prime (2782211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391108 + 1391109.

It is an arithmetic number, because the mean of its divisors is an integer number (1391109).

2^2782217 is an apocalyptic number.

It is an amenable number.

2782217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782217 is an equidigital number, since it uses as much as digits as its factorization.

2782217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 29.

The square root of 2782217 is about 1667.9979016773. The cubic root of 2782217 is about 140.6469547286.

The spelling of 2782217 in words is "two million, seven hundred eighty-two thousand, two hundred seventeen".