443113921 has 2 divisors, whose sum is σ = 443113922. Its totient is φ = 443113920.

The previous prime is 443113861. The next prime is 443113933. The reversal of 443113921 is 129311344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442513296 + 600625 = 21036^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 443113921 - 2¹¹ = 443111873 is a prime.

It is equal to p_23507353 and since 443113921 and 23507353 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 443113921.

It is not a weakly prime, because it can be changed into another prime (443813921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221556960 + 221556961.

It is an arithmetic number, because the mean of its divisors is an integer number (221556961).

Almost surely, 2^443113921 is an apocalyptic number.

It is an amenable number.

443113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

443113921 is an equidigital number, since it uses as much as digits as its factorization.

443113921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 443113921 is about 21050.2712809123. The cubic root of 443113921 is about 762.3805326043.

The spelling of 443113921 in words is "four hundred forty-three million, one hundred thirteen thousand, nine hundred twenty-one".