6403403 has 4 divisors (see below), whose sum is σ = 6624240. Its totient is φ = 6182568.

The previous prime is 6403393. The next prime is 6403417. The reversal of 6403403 is 3043046.

It is a happy number.

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

It is not a de Polignac number, because 6403403 - 2⁴ = 6403387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6403433) 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, 110375 + ... + 110432.

It is an arithmetic number, because the mean of its divisors is an integer number (1656060).

Almost surely, 2^6403403 is an apocalyptic number.

6403403 is a deficient number, since it is larger than the sum of its proper divisors (220837).

6403403 is a wasteful number, since it uses less digits than its factorization.

6403403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220836.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 6403403 is about 2530.4946156829. The cubic root of 6403403 is about 185.6964544447.

Adding to 6403403 its reverse (3043046), we get a palindrome (9446449).

The spelling of 6403403 in words is "six million, four hundred three thousand, four hundred three".