6403493 has 2 divisors, whose sum is σ = 6403494. Its totient is φ = 6403492.

The previous prime is 6403489. The next prime is 6403511. The reversal of 6403493 is 3943046.

It is a happy number.

6403493 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4870849 + 1532644 = 2207^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 6403493 - 2² = 6403489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6403433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201746 + 3201747.

It is an arithmetic number, because the mean of its divisors is an integer number (3201747).

Almost surely, 2^6403493 is an apocalyptic number.

It is an amenable number.

6403493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6403493 is an equidigital number, since it uses as much as digits as its factorization.

6403493 is an evil number, because the sum of its binary digits is even.

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

The square root of 6403493 is about 2530.5123987051. The cubic root of 6403493 is about 185.6973244301.

The spelling of 6403493 in words is "six million, four hundred three thousand, four hundred ninety-three".