6543129403 has 4 divisors (see below), whose sum is σ = 6546424360. Its totient is φ = 6539834448.

The previous prime is 6543129391. The next prime is 6543129407. The reversal of 6543129403 is 3049213456.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6543129403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6543129407) 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, 1644498 + ... + 1648471.

It is an arithmetic number, because the mean of its divisors is an integer number (1636606090).

Almost surely, 2^6543129403 is an apocalyptic number.

6543129403 is a deficient number, since it is larger than the sum of its proper divisors (3294957).

6543129403 is a wasteful number, since it uses less digits than its factorization.

6543129403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294956.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6543129403 is about 80889.6124542577. The cubic root of 6543129403 is about 1870.3741997583.

The spelling of 6543129403 in words is "six billion, five hundred forty-three million, one hundred twenty-nine thousand, four hundred three".