442393673 has 2 divisors, whose sum is σ = 442393674. Its totient is φ = 442393672.

The previous prime is 442393643. The next prime is 442393691. The reversal of 442393673 is 376393244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418939024 + 23454649 = 20468^2 + 4843^2 .

It is a cyclic number.

It is not a de Polignac number, because 442393673 - 2¹⁶ = 442328137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442393673.

It is not a weakly prime, because it can be changed into another prime (442393643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221196836 + 221196837.

It is an arithmetic number, because the mean of its divisors is an integer number (221196837).

Almost surely, 2^442393673 is an apocalyptic number.

It is an amenable number.

442393673 is a deficient number, since it is larger than the sum of its proper divisors (1).

442393673 is an equidigital number, since it uses as much as digits as its factorization.

442393673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 41.

The square root of 442393673 is about 21033.1565153688. The cubic root of 442393673 is about 761.9672447302.

The spelling of 442393673 in words is "four hundred forty-two million, three hundred ninety-three thousand, six hundred seventy-three".