647432543 has 8 divisors (see below), whose sum is σ = 711139200. Its totient is φ = 586689048.

The previous prime is 647432537. The next prime is 647432561. The reversal of 647432543 is 345234746.

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

It is a cyclic number.

It is not a de Polignac number, because 647432543 - 2²⁰ = 646383967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647432497 and 647432506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647432503) 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, 740333 + ... + 741206.

It is an arithmetic number, because the mean of its divisors is an integer number (88892400).

Almost surely, 2^647432543 is an apocalyptic number.

647432543 is a deficient number, since it is larger than the sum of its proper divisors (63706657).

647432543 is a wasteful number, since it uses less digits than its factorization.

647432543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481581.

The product of its digits is 241920, while the sum is 38.

The square root of 647432543 is about 25444.6957733827. The cubic root of 647432543 is about 865.0970713118.

The spelling of 647432543 in words is "six hundred forty-seven million, four hundred thirty-two thousand, five hundred forty-three".