6403943 has 8 divisors (see below), whose sum is σ = 7881888. Its totient is φ = 5066784.

The previous prime is 6403939. The next prime is 6403967. The reversal of 6403943 is 3493046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6403943 - 2² = 6403939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35096 + ... + 35277.

It is an arithmetic number, because the mean of its divisors is an integer number (985236).

Almost surely, 2^6403943 is an apocalyptic number.

6403943 is a deficient number, since it is larger than the sum of its proper divisors (1477945).

6403943 is a wasteful number, since it uses less digits than its factorization.

6403943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70393.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 6403943 is about 2530.6013119415. The cubic root of 6403943 is about 185.7016742352.

Adding to 6403943 its reverse (3493046), we get a palindrome (9896989).

The spelling of 6403943 in words is "six million, four hundred three thousand, nine hundred forty-three".