1284217939399 has 2 divisors, whose sum is σ = 1284217939400. Its totient is φ = 1284217939398.

The previous prime is 1284217939349. The next prime is 1284217939421. The reversal of 1284217939399 is 9939397124821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1284217939399 - 2¹⁷ = 1284217808327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284217939349) 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, 642108969699 + 642108969700.

It is an arithmetic number, because the mean of its divisors is an integer number (642108969700).

Almost surely, 2^{1284217939399} is an apocalyptic number.

1284217939399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284217939399 is an equidigital number, since it uses as much as digits as its factorization.

1284217939399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 67.

The spelling of 1284217939399 in words is "one trillion, two hundred eighty-four billion, two hundred seventeen million, nine hundred thirty-nine thousand, three hundred ninety-nine".