1284374204489 has 2 divisors, whose sum is σ = 1284374204490. Its totient is φ = 1284374204488.

The previous prime is 1284374204471. The next prime is 1284374204579. The reversal of 1284374204489 is 9844024734821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1122836929600 + 161537274889 = 1059640^2 + 401917^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284374204489 - 2²⁰ = 1284373155913 is a prime.

It is a super-2 number, since 2×1284374204489² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1284374204089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642187102244 + 642187102245.

It is an arithmetic number, because the mean of its divisors is an integer number (642187102245).

Almost surely, 2^{1284374204489} is an apocalyptic number.

It is an amenable number.

1284374204489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284374204489 is an equidigital number, since it uses as much as digits as its factorization.

1284374204489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 56.

The spelling of 1284374204489 in words is "one trillion, two hundred eighty-four billion, three hundred seventy-four million, two hundred four thousand, four hundred eighty-nine".