6390244043 has 4 divisors (see below), whose sum is σ = 6453513888. Its totient is φ = 6326974200.

The previous prime is 6390244009. The next prime is 6390244057. The reversal of 6390244043 is 3404420936.

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

It is a cyclic number.

It is not a de Polignac number, because 6390244043 - 2²⁰ = 6389195467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6390243994 and 6390244012.

It is not an unprimeable number, because it can be changed into a prime (6390244073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31634771 + ... + 31634972.

It is an arithmetic number, because the mean of its divisors is an integer number (1613378472).

Almost surely, 2^6390244043 is an apocalyptic number.

6390244043 is a deficient number, since it is larger than the sum of its proper divisors (63269845).

6390244043 is a wasteful number, since it uses less digits than its factorization.

6390244043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63269844.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 6390244043 is about 79939.0020140357. The cubic root of 6390244043 is about 1855.6916549040.

Adding to 6390244043 its reverse (3404420936), we get a palindrome (9794664979).

The spelling of 6390244043 in words is "six billion, three hundred ninety million, two hundred forty-four thousand, forty-three".