1039860291991 has 2 divisors, whose sum is σ = 1039860291992. Its totient is φ = 1039860291990.

The previous prime is 1039860291979. The next prime is 1039860292001. The reversal of 1039860291991 is 1991920689301.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1039860291991 - 2⁹ = 1039860291479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1039860291971) 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, 519930145995 + 519930145996.

It is an arithmetic number, because the mean of its divisors is an integer number (519930145996).

Almost surely, 2^{1039860291991} is an apocalyptic number.

1039860291991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039860291991 is an equidigital number, since it uses as much as digits as its factorization.

1039860291991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 1039860291991 in words is "one trillion, thirty-nine billion, eight hundred sixty million, two hundred ninety-one thousand, nine hundred ninety-one".