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643473473 is a prime number
BaseRepresentation
bin100110010110101…
…010000001000001
31122211210211122212
4212112222001001
52304212122343
6143503511505
721642301646
oct4626520101
91584724585
10643473473
11300251165
1215b5b8595
13a340a446
1461661dcd
153b758c18
hex265aa041

643473473 has 2 divisors, whose sum is σ = 643473474. Its totient is φ = 643473472.

The previous prime is 643473451. The next prime is 643473487. The reversal of 643473473 is 374374346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530519089 + 112954384 = 23033^2 + 10628^2 .

It is a cyclic number.

It is not a de Polignac number, because 643473473 - 28 = 643473217 is a prime.

It is a super-2 number, since 2×6434734732 = 828116220909363458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 643473473.

It is not a weakly prime, because it can be changed into another prime (643473433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321736736 + 321736737.

It is an arithmetic number, because the mean of its divisors is an integer number (321736737).

Almost surely, 2643473473 is an apocalyptic number.

It is an amenable number.

643473473 is a deficient number, since it is larger than the sum of its proper divisors (1).

643473473 is an equidigital number, since it uses as much as digits as its factorization.

643473473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 41.

The square root of 643473473 is about 25366.7789244121. The cubic root of 643473473 is about 863.3300996021.

The spelling of 643473473 in words is "six hundred forty-three million, four hundred seventy-three thousand, four hundred seventy-three".