6390043 has 4 divisors (see below), whose sum is σ = 6970968. Its totient is φ = 5809120.

The previous prime is 6390031. The next prime is 6390047. The reversal of 6390043 is 3400936.

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 6390043 - 2⁹ = 6389531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6390047) 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, 290446 + ... + 290467.

It is an arithmetic number, because the mean of its divisors is an integer number (1742742).

Almost surely, 2^6390043 is an apocalyptic number.

6390043 is a deficient number, since it is larger than the sum of its proper divisors (580925).

6390043 is a wasteful number, since it uses less digits than its factorization.

6390043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580924.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 6390043 is about 2527.8534372071. The cubic root of 6390043 is about 185.5672194107.

Adding to 6390043 its reverse (3400936), we get a palindrome (9790979).

The spelling of 6390043 in words is "six million, three hundred ninety thousand, forty-three".