42489983717 has 2 divisors, whose sum is σ = 42489983718. Its totient is φ = 42489983716.

The previous prime is 42489983681. The next prime is 42489983749. The reversal of 42489983717 is 71738998424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34596372001 + 7893611716 = 186001^2 + 88846^2 .

It is a cyclic number.

It is not a de Polignac number, because 42489983717 - 2²⁸ = 42221548261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42489983717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42479983717) 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, 21244991858 + 21244991859.

It is an arithmetic number, because the mean of its divisors is an integer number (21244991859).

Almost surely, 2^42489983717 is an apocalyptic number.

It is an amenable number.

42489983717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42489983717 is an equidigital number, since it uses as much as digits as its factorization.

42489983717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 62.

The spelling of 42489983717 in words is "forty-two billion, four hundred eighty-nine million, nine hundred eighty-three thousand, seven hundred seventeen".