1797992986871 has 2 divisors, whose sum is σ = 1797992986872. Its totient is φ = 1797992986870.

The previous prime is 1797992986717. The next prime is 1797992986897. The reversal of 1797992986871 is 1786892997971.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1797992986871 - 2¹⁸ = 1797992724727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1797992986871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1797992985871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 898996493435 + 898996493436.

It is an arithmetic number, because the mean of its divisors is an integer number (898996493436).

Almost surely, 2^{1797992986871} is an apocalyptic number.

1797992986871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1797992986871 is an equidigital number, since it uses as much as digits as its factorization.

1797992986871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728324864, while the sum is 83.

The spelling of 1797992986871 in words is "one trillion, seven hundred ninety-seven billion, nine hundred ninety-two million, nine hundred eighty-six thousand, eight hundred seventy-one".