443440057 has 2 divisors, whose sum is σ = 443440058. Its totient is φ = 443440056.

The previous prime is 443440009. The next prime is 443440061. The reversal of 443440057 is 750044344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311557801 + 131882256 = 17651^2 + 11484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-443440057 is a prime.

It is equal to p_23523763 and since 443440057 and 23523763 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (443440157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221720028 + 221720029.

It is an arithmetic number, because the mean of its divisors is an integer number (221720029).

Almost surely, 2^443440057 is an apocalyptic number.

It is an amenable number.

443440057 is a deficient number, since it is larger than the sum of its proper divisors (1).

443440057 is an equidigital number, since it uses as much as digits as its factorization.

443440057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 443440057 is about 21058.0164545477. The cubic root of 443440057 is about 762.5675264752.

The spelling of 443440057 in words is "four hundred forty-three million, four hundred forty thousand, fifty-seven".