421344441289 has 2 divisors, whose sum is σ = 421344441290. Its totient is φ = 421344441288.

The previous prime is 421344441283. The next prime is 421344441317. The reversal of 421344441289 is 982144443124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317118775689 + 104225665600 = 563133^2 + 322840^2 .

It is a cyclic number.

It is not a de Polignac number, because 421344441289 - 2³ = 421344441281 is a prime.

It is a super-2 number, since 2×421344441289² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421344441281) 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, 210672220644 + 210672220645.

It is an arithmetic number, because the mean of its divisors is an integer number (210672220645).

Almost surely, 2^421344441289 is an apocalyptic number.

It is an amenable number.

421344441289 is a deficient number, since it is larger than the sum of its proper divisors (1).

421344441289 is an equidigital number, since it uses as much as digits as its factorization.

421344441289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 46.

The spelling of 421344441289 in words is "four hundred twenty-one billion, three hundred forty-four million, four hundred forty-one thousand, two hundred eighty-nine".