6409543 has 6 divisors (see below), whose sum is σ = 7456056. Its totient is φ = 5493852.

The previous prime is 6409523. The next prime is 6409549. The reversal of 6409543 is 3459046.

It is not a de Polignac number, because 6409543 - 2⁵ = 6409511 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 4⁶ + 0 + 9² + 5 + 4¹¹ + 3¹² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65355 + ... + 65452.

It is an arithmetic number, because the mean of its divisors is an integer number (1242676).

Almost surely, 2^6409543 is an apocalyptic number.

6409543 is a deficient number, since it is larger than the sum of its proper divisors (1046513).

6409543 is a wasteful number, since it uses less digits than its factorization.

6409543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130821 (or 130814 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6409543 is about 2531.7075265520. The cubic root of 6409543 is about 185.7557881041.

The spelling of 6409543 in words is "six million, four hundred nine thousand, five hundred forty-three".