1943798849 has 2 divisors, whose sum is σ = 1943798850. Its totient is φ = 1943798848.

The previous prime is 1943798821. The next prime is 1943798869. The reversal of 1943798849 is 9488973491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1613468224 + 330330625 = 40168^2 + 18175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1943798849 - 2¹⁶ = 1943733313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1943798791 and 1943798800.

It is not a weakly prime, because it can be changed into another prime (1943798869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971899424 + 971899425.

It is an arithmetic number, because the mean of its divisors is an integer number (971899425).

Almost surely, 2^1943798849 is an apocalyptic number.

It is an amenable number.

1943798849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1943798849 is an equidigital number, since it uses as much as digits as its factorization.

1943798849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 62.

The square root of 1943798849 is about 44088.5342124231. The cubic root of 1943798849 is about 1248.0072459532.

The spelling of 1943798849 in words is "one billion, nine hundred forty-three million, seven hundred ninety-eight thousand, eight hundred forty-nine".