426844271989 has 2 divisors, whose sum is σ = 426844271990. Its totient is φ = 426844271988.

The previous prime is 426844271947. The next prime is 426844272031. The reversal of 426844271989 is 989172448624.

It is a balanced prime because it is at equal distance from previous prime (426844271947) and next prime (426844272031).

It can be written as a sum of positive squares in only one way, i.e., 349884080100 + 76960191889 = 591510^2 + 277417^2 .

It is a cyclic number.

It is not a de Polignac number, because 426844271989 - 2²³ = 426835883381 is a prime.

It is a super-3 number, since 3×426844271989³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 426844271989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426844271089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213422135994 + 213422135995.

It is an arithmetic number, because the mean of its divisors is an integer number (213422135995).

Almost surely, 2^426844271989 is an apocalyptic number.

It is an amenable number.

426844271989 is a deficient number, since it is larger than the sum of its proper divisors (1).

426844271989 is an equidigital number, since it uses as much as digits as its factorization.

426844271989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55738368, while the sum is 64.

The spelling of 426844271989 in words is "four hundred twenty-six billion, eight hundred forty-four million, two hundred seventy-one thousand, nine hundred eighty-nine".