1943390041 has 2 divisors, whose sum is σ = 1943390042. Its totient is φ = 1943390040.

The previous prime is 1943390023. The next prime is 1943390081. The reversal of 1943390041 is 1400933491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214174025 + 729216016 = 34845^2 + 27004^2 .

It is an emirp because it is prime and its reverse (1400933491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1943390041 - 2⁹ = 1943389529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1943389979 and 1943390006.

It is not a weakly prime, because it can be changed into another prime (1943390081) 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, 971695020 + 971695021.

It is an arithmetic number, because the mean of its divisors is an integer number (971695021).

Almost surely, 2^1943390041 is an apocalyptic number.

It is an amenable number.

1943390041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1943390041 is an equidigital number, since it uses as much as digits as its factorization.

1943390041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1943390041 is about 44083.8977519003. The cubic root of 1943390041 is about 1247.9197487108.

The spelling of 1943390041 in words is "one billion, nine hundred forty-three million, three hundred ninety thousand, forty-one".