169085149 has 2 divisors, whose sum is σ = 169085150. Its totient is φ = 169085148.

The previous prime is 169085143. The next prime is 169085173. The reversal of 169085149 is 941580961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163712025 + 5373124 = 12795^2 + 2318^2 .

It is a cyclic number.

It is not a de Polignac number, because 169085149 - 2³ = 169085141 is a prime.

It is a super-2 number, since 2×169085149² = 57179575224704402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169085141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84542574 + 84542575.

It is an arithmetic number, because the mean of its divisors is an integer number (84542575).

Almost surely, 2^169085149 is an apocalyptic number.

It is an amenable number.

169085149 is a deficient number, since it is larger than the sum of its proper divisors (1).

169085149 is an equidigital number, since it uses as much as digits as its factorization.

169085149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 169085149 is about 13003.2745491280. The cubic root of 169085149 is about 552.9703197514.

The spelling of 169085149 in words is "one hundred sixty-nine million, eighty-five thousand, one hundred forty-nine".