42174131693 has 2 divisors, whose sum is σ = 42174131694. Its totient is φ = 42174131692.

The previous prime is 42174131639. The next prime is 42174131707. The reversal of 42174131693 is 39613147124.

Together with previous prime (42174131639) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23999586724 + 18174544969 = 154918^2 + 134813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42174131693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42174131693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42174134693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21087065846 + 21087065847.

It is an arithmetic number, because the mean of its divisors is an integer number (21087065847).

Almost surely, 2^42174131693 is an apocalyptic number.

It is an amenable number.

42174131693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42174131693 is an equidigital number, since it uses as much as digits as its factorization.

42174131693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The spelling of 42174131693 in words is "forty-two billion, one hundred seventy-four million, one hundred thirty-one thousand, six hundred ninety-three".