7281843449 has 2 divisors, whose sum is σ = 7281843450. Its totient is φ = 7281843448.

The previous prime is 7281843419. The next prime is 7281843511. The reversal of 7281843449 is 9443481827.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7021602025 + 260241424 = 83795^2 + 16132^2 .

It is a cyclic number.

It is not a de Polignac number, because 7281843449 - 2⁸ = 7281843193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7281843397 and 7281843406.

It is not a weakly prime, because it can be changed into another prime (7281843409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640921724 + 3640921725.

It is an arithmetic number, because the mean of its divisors is an integer number (3640921725).

Almost surely, 2^7281843449 is an apocalyptic number.

It is an amenable number.

7281843449 is a deficient number, since it is larger than the sum of its proper divisors (1).

7281843449 is an equidigital number, since it uses as much as digits as its factorization.

7281843449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 50.

The square root of 7281843449 is about 85333.7181247835. The cubic root of 7281843449 is about 1938.2677924538.

The spelling of 7281843449 in words is "seven billion, two hundred eighty-one million, eight hundred forty-three thousand, four hundred forty-nine".