171187141 has 2 divisors, whose sum is σ = 171187142. Its totient is φ = 171187140.

The previous prime is 171187111. The next prime is 171187147. The reversal of 171187141 is 141781171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98426241 + 72760900 = 9921^2 + 8530^2 .

It is a cyclic number.

It is not a de Polignac number, because 171187141 - 2⁵ = 171187109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171187147) 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, 85593570 + 85593571.

It is an arithmetic number, because the mean of its divisors is an integer number (85593571).

Almost surely, 2^171187141 is an apocalyptic number.

It is an amenable number.

171187141 is a deficient number, since it is larger than the sum of its proper divisors (1).

171187141 is an equidigital number, since it uses as much as digits as its factorization.

171187141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 31.

The square root of 171187141 is about 13083.8503889337. The cubic root of 171187141 is about 555.2523171641.

The spelling of 171187141 in words is "one hundred seventy-one million, one hundred eighty-seven thousand, one hundred forty-one".