171690149 has 2 divisors, whose sum is σ = 171690150. Its totient is φ = 171690148.

The previous prime is 171690131. The next prime is 171690163. The reversal of 171690149 is 941096171.

171690149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160833124 + 10857025 = 12682^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 171690149 - 2¹⁶ = 171624613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171690119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85845074 + 85845075.

It is an arithmetic number, because the mean of its divisors is an integer number (85845075).

Almost surely, 2^171690149 is an apocalyptic number.

It is an amenable number.

171690149 is a deficient number, since it is larger than the sum of its proper divisors (1).

171690149 is an equidigital number, since it uses as much as digits as its factorization.

171690149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 171690149 is about 13103.0587650365. The cubic root of 171690149 is about 555.7956275332.

The spelling of 171690149 in words is "one hundred seventy-one million, six hundred ninety thousand, one hundred forty-nine".