443664401 has 4 divisors (see below), whose sum is σ = 443812404. Its totient is φ = 443516400.

The previous prime is 443664379. The next prime is 443664413. The reversal of 443664401 is 104466344.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 247244176 + 196420225 = 15724^2 + 14015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-443664401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (443664461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69410 + ... + 75531.

It is an arithmetic number, because the mean of its divisors is an integer number (110953101).

Almost surely, 2^443664401 is an apocalyptic number.

It is an amenable number.

443664401 is a deficient number, since it is larger than the sum of its proper divisors (148003).

443664401 is a wasteful number, since it uses less digits than its factorization.

443664401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148002.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 443664401 is about 21063.3425884877. The cubic root of 443664401 is about 762.6961034979.

The spelling of 443664401 in words is "four hundred forty-three million, six hundred sixty-four thousand, four hundred one".