1273841489 has 2 divisors, whose sum is σ = 1273841490. Its totient is φ = 1273841488.

The previous prime is 1273841419. The next prime is 1273841509. The reversal of 1273841489 is 9841483721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030731025 + 243110464 = 32105^2 + 15592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1273841489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1273841419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636920744 + 636920745.

It is an arithmetic number, because the mean of its divisors is an integer number (636920745).

Almost surely, 2^1273841489 is an apocalyptic number.

It is an amenable number.

1273841489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273841489 is an equidigital number, since it uses as much as digits as its factorization.

1273841489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 1273841489 is about 35690.9160571706. The cubic root of 1273841489 is about 1084.0229161538.

The spelling of 1273841489 in words is "one billion, two hundred seventy-three million, eight hundred forty-one thousand, four hundred eighty-nine".