6816403 has 8 divisors (see below), whose sum is σ = 7609536. Its totient is φ = 6052200.

The previous prime is 6816401. The next prime is 6816413. The reversal of 6816403 is 3046186.

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

It is not a de Polignac number, because 6816403 - 2¹ = 6816401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6816401) 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, 6733 + ... + 7678.

It is an arithmetic number, because the mean of its divisors is an integer number (951192).

Almost surely, 2^6816403 is an apocalyptic number.

6816403 is a deficient number, since it is larger than the sum of its proper divisors (793133).

6816403 is a wasteful number, since it uses less digits than its factorization.

6816403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14465.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6816403 is about 2610.8241993669. The cubic root of 6816403 is about 189.6058588485.

It can be divided in two parts, 68 and 16403, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 6816403 in words is "six million, eight hundred sixteen thousand, four hundred three".