647130643 has 4 divisors (see below), whose sum is σ = 647187280. Its totient is φ = 647074008.

The previous prime is 647130637. The next prime is 647130647. The reversal of 647130643 is 346031746.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 647130643 - 2¹³ = 647122451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647130599 and 647130608.

It is not an unprimeable number, because it can be changed into a prime (647130647) 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, 4503 + ... + 36256.

It is an arithmetic number, because the mean of its divisors is an integer number (161796820).

Almost surely, 2^647130643 is an apocalyptic number.

647130643 is a deficient number, since it is larger than the sum of its proper divisors (56637).

647130643 is a wasteful number, since it uses less digits than its factorization.

647130643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56636.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 647130643 is about 25438.7626074855. The cubic root of 647130643 is about 864.9625845021.

The spelling of 647130643 in words is "six hundred forty-seven million, one hundred thirty thousand, six hundred forty-three".