1984141972489 has 2 divisors, whose sum is σ = 1984141972490. Its totient is φ = 1984141972488.

The previous prime is 1984141972481. The next prime is 1984141972559. The reversal of 1984141972489 is 9842791414891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879106348025 + 105035624464 = 1370805^2 + 324092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984141972489 - 2³ = 1984141972481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1984141972481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992070986244 + 992070986245.

It is an arithmetic number, because the mean of its divisors is an integer number (992070986245).

Almost surely, 2^{1984141972489} is an apocalyptic number.

It is an amenable number.

1984141972489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984141972489 is an equidigital number, since it uses as much as digits as its factorization.

1984141972489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 67.

The spelling of 1984141972489 in words is "one trillion, nine hundred eighty-four billion, one hundred forty-one million, nine hundred seventy-two thousand, four hundred eighty-nine".