1988489188291 has 2 divisors, whose sum is σ = 1988489188292. Its totient is φ = 1988489188290.

The previous prime is 1988489188171. The next prime is 1988489188297. The reversal of 1988489188291 is 1928819848891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988489188291 - 2³¹ = 1986341704643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1988489188297) 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, 994244594145 + 994244594146.

It is an arithmetic number, because the mean of its divisors is an integer number (994244594146).

Almost surely, 2^{1988489188291} is an apocalyptic number.

1988489188291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988489188291 is an equidigital number, since it uses as much as digits as its factorization.

1988489188291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 191102976, while the sum is 76.

The spelling of 1988489188291 in words is "one trillion, nine hundred eighty-eight billion, four hundred eighty-nine million, one hundred eighty-eight thousand, two hundred ninety-one".