443748421 has 4 divisors (see below), whose sum is σ = 443797312. Its totient is φ = 443699532.

The previous prime is 443748419. The next prime is 443748427. The reversal of 443748421 is 124847344.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 443748421 - 2¹ = 443748419 is a prime.

It is a super-2 number, since 2×443748421² = 393825322279986482, 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 (443748427) 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, 6381 + ... + 30466.

It is an arithmetic number, because the mean of its divisors is an integer number (110949328).

Almost surely, 2^443748421 is an apocalyptic number.

It is an amenable number.

443748421 is a deficient number, since it is larger than the sum of its proper divisors (48891).

443748421 is a wasteful number, since it uses less digits than its factorization.

443748421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48890.

The product of its digits is 86016, while the sum is 37.

The square root of 443748421 is about 21065.3369543428. The cubic root of 443748421 is about 762.7442462545.

The spelling of 443748421 in words is "four hundred forty-three million, seven hundred forty-eight thousand, four hundred twenty-one".