443421472435621 has 2 divisors, whose sum is σ = 443421472435622. Its totient is φ = 443421472435620.

The previous prime is 443421472435567. The next prime is 443421472435651. The reversal of 443421472435621 is 126534274124344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319640583465025 + 123780888970596 = 17878495^2 + 11125686^2 .

It is a cyclic number.

It is not a de Polignac number, because 443421472435621 - 2¹⁹ = 443421471911333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443421472435651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221710736217810 + 221710736217811.

It is an arithmetic number, because the mean of its divisors is an integer number (221710736217811).

Almost surely, 2^{443421472435621} is an apocalyptic number.

It is an amenable number.

443421472435621 is a deficient number, since it is larger than the sum of its proper divisors (1).

443421472435621 is an equidigital number, since it uses as much as digits as its factorization.

443421472435621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15482880, while the sum is 52.

The spelling of 443421472435621 in words is "four hundred forty-three trillion, four hundred twenty-one billion, four hundred seventy-two million, four hundred thirty-five thousand, six hundred twenty-one".