443500013 has 4 divisors (see below), whose sum is σ = 483818208. Its totient is φ = 403181820.

The previous prime is 443500003. The next prime is 443500021. The reversal of 443500013 is 310005344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 443500013 - 2¹² = 443495917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443500003) 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, 20159081 + ... + 20159102.

It is an arithmetic number, because the mean of its divisors is an integer number (120954552).

Almost surely, 2^443500013 is an apocalyptic number.

It is an amenable number.

443500013 is a deficient number, since it is larger than the sum of its proper divisors (40318195).

443500013 is a wasteful number, since it uses less digits than its factorization.

443500013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40318194.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 443500013 is about 21059.4399973029. The cubic root of 443500013 is about 762.6018929677.

Adding to 443500013 its reverse (310005344), we get a palindrome (753505357).

The spelling of 443500013 in words is "four hundred forty-three million, five hundred thousand, thirteen".