171161143847 has 2 divisors, whose sum is σ = 171161143848. Its totient is φ = 171161143846.

The previous prime is 171161143823. The next prime is 171161143897. The reversal of 171161143847 is 748341161171.

It is a weak prime.

It is an emirp because it is prime and its reverse (748341161171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171161143847 - 2¹⁶ = 171161078311 is a prime.

It is a super-2 number, since 2×171161143847² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 171161143798 and 171161143807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171161143817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85580571923 + 85580571924.

It is an arithmetic number, because the mean of its divisors is an integer number (85580571924).

Almost surely, 2^171161143847 is an apocalyptic number.

171161143847 is a deficient number, since it is larger than the sum of its proper divisors (1).

171161143847 is an equidigital number, since it uses as much as digits as its factorization.

171161143847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The spelling of 171161143847 in words is "one hundred seventy-one billion, one hundred sixty-one million, one hundred forty-three thousand, eight hundred forty-seven".