1040043244393 has 2 divisors, whose sum is σ = 1040043244394. Its totient is φ = 1040043244392.

The previous prime is 1040043244319. The next prime is 1040043244397. The reversal of 1040043244393 is 3934423400401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 862981545024 + 177061699369 = 928968^2 + 420787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040043244393 - 2³³ = 1031453309801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040043244397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520021622196 + 520021622197.

It is an arithmetic number, because the mean of its divisors is an integer number (520021622197).

Almost surely, 2^{1040043244393} is an apocalyptic number.

It is an amenable number.

1040043244393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040043244393 is an equidigital number, since it uses as much as digits as its factorization.

1040043244393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 1040043244393 its reverse (3934423400401), we get a palindrome (4974466644794).

The spelling of 1040043244393 in words is "one trillion, forty billion, forty-three million, two hundred forty-four thousand, three hundred ninety-three".