1991034883313 has 8 divisors (see below), whose sum is σ = 2279305657728. Its totient is φ = 1703723413824.

The previous prime is 1991034883307. The next prime is 1991034883333. The reversal of 1991034883313 is 3133884301991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1991034883313 - 2²² = 1991030689009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1991034883333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239821781 + ... + 239830082.

It is an arithmetic number, because the mean of its divisors is an integer number (284913207216).

Almost surely, 2^{1991034883313} is an apocalyptic number.

It is an amenable number.

1991034883313 is a deficient number, since it is larger than the sum of its proper divisors (288270774415).

1991034883313 is an equidigital number, since it uses as much as digits as its factorization.

1991034883313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479652463.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 1991034883313 in words is "one trillion, nine hundred ninety-one billion, thirty-four million, eight hundred eighty-three thousand, three hundred thirteen".