42143424709 has 2 divisors, whose sum is σ = 42143424710. Its totient is φ = 42143424708.

The previous prime is 42143424707. The next prime is 42143424727. The reversal of 42143424709 is 90742434124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36441664609 + 5701760100 = 190897^2 + 75510^2 .

It is a cyclic number.

It is not a de Polignac number, because 42143424709 - 2¹ = 42143424707 is a prime.

Together with 42143424707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42143424707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071712354 + 21071712355.

It is an arithmetic number, because the mean of its divisors is an integer number (21071712355).

Almost surely, 2^42143424709 is an apocalyptic number.

It is an amenable number.

42143424709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42143424709 is an equidigital number, since it uses as much as digits as its factorization.

42143424709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 42143424709 in words is "forty-two billion, one hundred forty-three million, four hundred twenty-four thousand, seven hundred nine".