647360643 has 16 divisors (see below), whose sum is σ = 868887936. Its totient is φ = 428712960.

The previous prime is 647360639. The next prime is 647360653. The reversal of 647360643 is 346063746.

It is not a de Polignac number, because 647360643 - 2² = 647360639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647360653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435780 + ... + 437262.

It is an arithmetic number, because the mean of its divisors is an integer number (54305496).

Almost surely, 2^647360643 is an apocalyptic number.

647360643 is a deficient number, since it is larger than the sum of its proper divisors (221527293).

647360643 is a wasteful number, since it uses less digits than its factorization.

647360643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354.

The product of its (nonzero) digits is 217728, while the sum is 39.

The square root of 647360643 is about 25443.2828660140. The cubic root of 647360643 is about 865.0650459511.

The spelling of 647360643 in words is "six hundred forty-seven million, three hundred sixty thousand, six hundred forty-three".