1043540441309 has 2 divisors, whose sum is σ = 1043540441310. Its totient is φ = 1043540441308.

The previous prime is 1043540441267. The next prime is 1043540441369. The reversal of 1043540441309 is 9031440453401.

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., 649721438809 + 393819002500 = 806053^2 + 627550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043540441309 - 2¹² = 1043540437213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1043540441369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521770220654 + 521770220655.

It is an arithmetic number, because the mean of its divisors is an integer number (521770220655).

Almost surely, 2^{1043540441309} is an apocalyptic number.

It is an amenable number.

1043540441309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043540441309 is an equidigital number, since it uses as much as digits as its factorization.

1043540441309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 1043540441309 in words is "one trillion, forty-three billion, five hundred forty million, four hundred forty-one thousand, three hundred nine".