42730500643 has 2 divisors, whose sum is σ = 42730500644. Its totient is φ = 42730500642.

The previous prime is 42730500641. The next prime is 42730500677. The reversal of 42730500643 is 34600503724.

It is an a-pointer prime, because the next prime (42730500677) can be obtained adding 42730500643 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42730500643 - 2¹ = 42730500641 is a prime.

Together with 42730500641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42730500599 and 42730500608.

It is not a weakly prime, because it can be changed into another prime (42730500641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21365250321 + 21365250322.

It is an arithmetic number, because the mean of its divisors is an integer number (21365250322).

Almost surely, 2^42730500643 is an apocalyptic number.

42730500643 is a deficient number, since it is larger than the sum of its proper divisors (1).

42730500643 is an equidigital number, since it uses as much as digits as its factorization.

42730500643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 34.

The spelling of 42730500643 in words is "forty-two billion, seven hundred thirty million, five hundred thousand, six hundred forty-three".