171984161929 has 2 divisors, whose sum is σ = 171984161930. Its totient is φ = 171984161928.

The previous prime is 171984161917. The next prime is 171984161977. The reversal of 171984161929 is 929161489171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159428511225 + 12555650704 = 399285^2 + 112052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171984161929 is a prime.

It is not a weakly prime, because it can be changed into another prime (171984161989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85992080964 + 85992080965.

It is an arithmetic number, because the mean of its divisors is an integer number (85992080965).

Almost surely, 2^171984161929 is an apocalyptic number.

It is an amenable number.

171984161929 is a deficient number, since it is larger than the sum of its proper divisors (1).

171984161929 is an equidigital number, since it uses as much as digits as its factorization.

171984161929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 58.

The spelling of 171984161929 in words is "one hundred seventy-one billion, nine hundred eighty-four million, one hundred sixty-one thousand, nine hundred twenty-nine".