169960181 has 2 divisors, whose sum is σ = 169960182. Its totient is φ = 169960180.

The previous prime is 169960159. The next prime is 169960183. The reversal of 169960181 is 181069961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161163025 + 8797156 = 12695^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 169960181 - 2⁶ = 169960117 is a prime.

It is a super-4 number, since 4×169960181⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 169960183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169960183) 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, 84980090 + 84980091.

It is an arithmetic number, because the mean of its divisors is an integer number (84980091).

Almost surely, 2^169960181 is an apocalyptic number.

It is an amenable number.

169960181 is a deficient number, since it is larger than the sum of its proper divisors (1).

169960181 is an equidigital number, since it uses as much as digits as its factorization.

169960181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 169960181 is about 13036.8777320338. The cubic root of 169960181 is about 553.9225706016.

The spelling of 169960181 in words is "one hundred sixty-nine million, nine hundred sixty thousand, one hundred eighty-one".