171192638719939 has 2 divisors, whose sum is σ = 171192638719940. Its totient is φ = 171192638719938.

The previous prime is 171192638719831. The next prime is 171192638720029. The reversal of 171192638719939 is 939917836291171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171192638719939 - 2¹³ = 171192638711747 is a prime.

It is not a weakly prime, because it can be changed into another prime (171192638719339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85596319359969 + 85596319359970.

It is an arithmetic number, because the mean of its divisors is an integer number (85596319359970).

Almost surely, 2^{171192638719939} is an apocalyptic number.

171192638719939 is a deficient number, since it is larger than the sum of its proper divisors (1).

171192638719939 is an equidigital number, since it uses as much as digits as its factorization.

171192638719939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 277766496, while the sum is 76.

The spelling of 171192638719939 in words is "one hundred seventy-one trillion, one hundred ninety-two billion, six hundred thirty-eight million, seven hundred nineteen thousand, nine hundred thirty-nine".