1039993561 has 2 divisors, whose sum is σ = 1039993562. Its totient is φ = 1039993560.

The previous prime is 1039993517. The next prime is 1039993583. The reversal of 1039993561 is 1653999301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005841225 + 34152336 = 31715^2 + 5844^2 .

It is an emirp because it is prime and its reverse (1653999301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1039993561 - 2¹⁷ = 1039862489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1039993501) 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, 519996780 + 519996781.

It is an arithmetic number, because the mean of its divisors is an integer number (519996781).

Almost surely, 2^1039993561 is an apocalyptic number.

It is an amenable number.

1039993561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039993561 is an equidigital number, since it uses as much as digits as its factorization.

1039993561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 1039993561 is about 32248.9311605827. The cubic root of 1039993561 is about 1013.1573128757.

The spelling of 1039993561 in words is "one billion, thirty-nine million, nine hundred ninety-three thousand, five hundred sixty-one".