1019481849209 has 2 divisors, whose sum is σ = 1019481849210. Its totient is φ = 1019481849208.

The previous prime is 1019481849173. The next prime is 1019481849233. The reversal of 1019481849209 is 9029481849101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981183359209 + 38298490000 = 990547^2 + 195700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1019481849209 - 2¹⁶ = 1019481783673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1019481849259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509740924604 + 509740924605.

It is an arithmetic number, because the mean of its divisors is an integer number (509740924605).

Almost surely, 2^{1019481849209} is an apocalyptic number.

It is an amenable number.

1019481849209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019481849209 is an equidigital number, since it uses as much as digits as its factorization.

1019481849209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The spelling of 1019481849209 in words is "one trillion, nineteen billion, four hundred eighty-one million, eight hundred forty-nine thousand, two hundred nine".