42810047123 has 2 divisors, whose sum is σ = 42810047124. Its totient is φ = 42810047122.

The previous prime is 42810047099. The next prime is 42810047129. The reversal of 42810047123 is 32174001824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42810047123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42810047123.

It is not a weakly prime, because it can be changed into another prime (42810047129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21405023561 + 21405023562.

It is an arithmetic number, because the mean of its divisors is an integer number (21405023562).

Almost surely, 2^42810047123 is an apocalyptic number.

42810047123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42810047123 is an equidigital number, since it uses as much as digits as its factorization.

42810047123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 42810047123 its reverse (32174001824), we get a palindrome (74984048947).

The spelling of 42810047123 in words is "forty-two billion, eight hundred ten million, forty-seven thousand, one hundred twenty-three".