426839989717 has 2 divisors, whose sum is σ = 426839989718. Its totient is φ = 426839989716.

The previous prime is 426839989703. The next prime is 426839989777. The reversal of 426839989717 is 717989938624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424783276516 + 2056713201 = 651754^2 + 45351^2 .

It is a cyclic number.

It is not a de Polignac number, because 426839989717 - 2³⁵ = 392480251349 is a prime.

It is a super-3 number, since 3×426839989717³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 426839989717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426839989777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213419994858 + 213419994859.

It is an arithmetic number, because the mean of its divisors is an integer number (213419994859).

Almost surely, 2^426839989717 is an apocalyptic number.

It is an amenable number.

426839989717 is a deficient number, since it is larger than the sum of its proper divisors (1).

426839989717 is an equidigital number, since it uses as much as digits as its factorization.

426839989717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329204736, while the sum is 73.

The spelling of 426839989717 in words is "four hundred twenty-six billion, eight hundred thirty-nine million, nine hundred eighty-nine thousand, seven hundred seventeen".