1990583174191 has 2 divisors, whose sum is σ = 1990583174192. Its totient is φ = 1990583174190.

The previous prime is 1990583174189. The next prime is 1990583174227. The reversal of 1990583174191 is 1914713850991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1990583174191 - 2¹ = 1990583174189 is a prime.

Together with 1990583174189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990583174131) 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, 995291587095 + 995291587096.

It is an arithmetic number, because the mean of its divisors is an integer number (995291587096).

Almost surely, 2^{1990583174191} is an apocalyptic number.

1990583174191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990583174191 is an equidigital number, since it uses as much as digits as its factorization.

1990583174191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 58.

The spelling of 1990583174191 in words is "one trillion, nine hundred ninety billion, five hundred eighty-three million, one hundred seventy-four thousand, one hundred ninety-one".