443312013 has 4 divisors (see below), whose sum is σ = 591082688. Its totient is φ = 295541340.

The previous prime is 443311963. The next prime is 443312027. The reversal of 443312013 is 310213344.

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 not a de Polignac number, because 443312013 - 2²² = 439117709 is a prime.

It is a super-2 number, since 2×443312013² = 393051081740224338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443312053) 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, 73885333 + ... + 73885338.

It is an arithmetic number, because the mean of its divisors is an integer number (147770672).

Almost surely, 2^443312013 is an apocalyptic number.

It is an amenable number.

443312013 is a deficient number, since it is larger than the sum of its proper divisors (147770675).

443312013 is a wasteful number, since it uses less digits than its factorization.

443312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147770674.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 443312013 is about 21054.9759676899. The cubic root of 443312013 is about 762.4941218932.

Adding to 443312013 its reverse (310213344), we get a palindrome (753525357).

The spelling of 443312013 in words is "four hundred forty-three million, three hundred twelve thousand, thirteen".