1042943813 has 2 divisors, whose sum is σ = 1042943814. Its totient is φ = 1042943812.

The previous prime is 1042943789. The next prime is 1042943831. The reversal of 1042943813 is 3183492401.

1042943813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (1042943831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690743524 + 352200289 = 26282^2 + 18767^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042943813 - 2⁶ = 1042943749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042943833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521471906 + 521471907.

It is an arithmetic number, because the mean of its divisors is an integer number (521471907).

Almost surely, 2^1042943813 is an apocalyptic number.

It is an amenable number.

1042943813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042943813 is an equidigital number, since it uses as much as digits as its factorization.

1042943813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1042943813 is about 32294.6406234843. The cubic root of 1042943813 is about 1014.1144493697.

The spelling of 1042943813 in words is "one billion, forty-two million, nine hundred forty-three thousand, eight hundred thirteen".