1991034883307 has 2 divisors, whose sum is σ = 1991034883308. Its totient is φ = 1991034883306.

The previous prime is 1991034883301. The next prime is 1991034883333. The reversal of 1991034883307 is 7033884301991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1991034883307 - 2³⁸ = 1716156976363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1991034883301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995517441653 + 995517441654.

It is an arithmetic number, because the mean of its divisors is an integer number (995517441654).

Almost surely, 2^{1991034883307} is an apocalyptic number.

1991034883307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1991034883307 is an equidigital number, since it uses as much as digits as its factorization.

1991034883307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 1991034883307 in words is "one trillion, nine hundred ninety-one billion, thirty-four million, eight hundred eighty-three thousand, three hundred seven".