1042409993 has 2 divisors, whose sum is σ = 1042409994. Its totient is φ = 1042409992.

The previous prime is 1042409987. The next prime is 1042410007. The reversal of 1042409993 is 3999042401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1013594569 + 28815424 = 31837^2 + 5368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042409993 - 2⁸ = 1042409737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1042409993.

It is not a weakly prime, because it can be changed into another prime (1042409923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521204996 + 521204997.

It is an arithmetic number, because the mean of its divisors is an integer number (521204997).

Almost surely, 2^1042409993 is an apocalyptic number.

It is an amenable number.

1042409993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042409993 is an equidigital number, since it uses as much as digits as its factorization.

1042409993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1042409993 is about 32286.3747268101. The cubic root of 1042409993 is about 1013.9413985121.

The spelling of 1042409993 in words is "one billion, forty-two million, four hundred nine thousand, nine hundred ninety-three".