171992678371 has 2 divisors, whose sum is σ = 171992678372. Its totient is φ = 171992678370.

The previous prime is 171992678329. The next prime is 171992678401. The reversal of 171992678371 is 173876299171.

It is a strong prime.

It is an emirp because it is prime and its reverse (173876299171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171992678371 - 2¹⁵ = 171992645603 is a prime.

It is not a weakly prime, because it can be changed into another prime (171992676371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85996339185 + 85996339186.

It is an arithmetic number, because the mean of its divisors is an integer number (85996339186).

Almost surely, 2^171992678371 is an apocalyptic number.

171992678371 is a deficient number, since it is larger than the sum of its proper divisors (1).

171992678371 is an equidigital number, since it uses as much as digits as its factorization.

171992678371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 61.

The spelling of 171992678371 in words is "one hundred seventy-one billion, nine hundred ninety-two million, six hundred seventy-eight thousand, three hundred seventy-one".