647922443 has 24 divisors (see below), whose sum is σ = 789888672. Its totient is φ = 528912384.

The previous prime is 647922421. The next prime is 647922449. The reversal of 647922443 is 344229746.

It is not a de Polignac number, because 647922443 - 2¹⁶ = 647856907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647922443.

It is not an unprimeable number, because it can be changed into a prime (647922449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288521 + ... + 290757.

It is an arithmetic number, because the mean of its divisors is an integer number (32912028).

Almost surely, 2^647922443 is an apocalyptic number.

647922443 is a deficient number, since it is larger than the sum of its proper divisors (141966229).

647922443 is a wasteful number, since it uses less digits than its factorization.

647922443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531 (or 2524 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 647922443 is about 25454.3207137806. The cubic root of 647922443 is about 865.3152171805.

The spelling of 647922443 in words is "six hundred forty-seven million, nine hundred twenty-two thousand, four hundred forty-three".