2279784957209 has 2 divisors, whose sum is σ = 2279784957210. Its totient is φ = 2279784957208.

The previous prime is 2279784957199. The next prime is 2279784957253. The reversal of 2279784957209 is 9027594879722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1632588841984 + 647196115225 = 1277728^2 + 804485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279784957209 - 2¹² = 2279784953113 is a prime.

It is a super-2 number, since 2×2279784957209² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2279784957509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139892478604 + 1139892478605.

It is an arithmetic number, because the mean of its divisors is an integer number (1139892478605).

Almost surely, 2^{2279784957209} is an apocalyptic number.

It is an amenable number.

2279784957209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2279784957209 is an equidigital number, since it uses as much as digits as its factorization.

2279784957209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320060160, while the sum is 71.

The spelling of 2279784957209 in words is "two trillion, two hundred seventy-nine billion, seven hundred eighty-four million, nine hundred fifty-seven thousand, two hundred nine".