2443743921 has 16 divisors (see below), whose sum is σ = 3377105600. Its totient is φ = 1570580928.

The previous prime is 2443743901. The next prime is 2443743937. The reversal of 2443743921 is 1293473442.

It is not a de Polignac number, because 2443743921 - 2⁵ = 2443743889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2443743921.

It is not an unprimeable number, because it can be changed into a prime (2443743901) 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 in 15 ways as a sum of consecutive naturals, for example, 88891 + ... + 113088.

It is an arithmetic number, because the mean of its divisors is an integer number (211069100).

Almost surely, 2^2443743921 is an apocalyptic number.

It is an amenable number.

2443743921 is a deficient number, since it is larger than the sum of its proper divisors (933361679).

2443743921 is a wasteful number, since it uses less digits than its factorization.

2443743921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202128.

The product of its digits is 145152, while the sum is 39.

The square root of 2443743921 is about 49434.2383475259. The cubic root of 2443743921 is about 1346.9513135170.

The spelling of 2443743921 in words is "two billion, four hundred forty-three million, seven hundred forty-three thousand, nine hundred twenty-one".