42170237717 has 2 divisors, whose sum is σ = 42170237718. Its totient is φ = 42170237716.

The previous prime is 42170237677. The next prime is 42170237771. The reversal of 42170237717 is 71773207124.

Together with next prime (42170237771) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34908811921 + 7261425796 = 186839^2 + 85214^2 .

It is a cyclic number.

It is not a de Polignac number, because 42170237717 - 2¹⁴ = 42170221333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42170237797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085118858 + 21085118859.

It is an arithmetic number, because the mean of its divisors is an integer number (21085118859).

Almost surely, 2^42170237717 is an apocalyptic number.

It is an amenable number.

42170237717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42170237717 is an equidigital number, since it uses as much as digits as its factorization.

42170237717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115248, while the sum is 41.

The spelling of 42170237717 in words is "forty-two billion, one hundred seventy million, two hundred thirty-seven thousand, seven hundred seventeen".