171266149 has 2 divisors, whose sum is σ = 171266150. Its totient is φ = 171266148.

The previous prime is 171266107. The next prime is 171266189. The reversal of 171266149 is 941662171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110145025 + 61121124 = 10495^2 + 7818^2 .

It is an emirp because it is prime and its reverse (941662171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171266149 - 2¹⁹ = 170741861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171266189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85633074 + 85633075.

It is an arithmetic number, because the mean of its divisors is an integer number (85633075).

Almost surely, 2^171266149 is an apocalyptic number.

It is an amenable number.

171266149 is a deficient number, since it is larger than the sum of its proper divisors (1).

171266149 is an equidigital number, since it uses as much as digits as its factorization.

171266149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 171266149 is about 13086.8693353300. The cubic root of 171266149 is about 555.3377258920.

The spelling of 171266149 in words is "one hundred seventy-one million, two hundred sixty-six thousand, one hundred forty-nine".