4000169 has 2 divisors, whose sum is σ = 4000170. Its totient is φ = 4000168.

The previous prime is 4000159. The next prime is 4000189. The reversal of 4000169 is 9610004.

4000169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (4000189) can be obtained adding 4000169 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 169 = 2000^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000169 - 2⁴ = 4000153 is a prime.

It is a super-2 number, since 2×4000169² = 32002704057122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4000169.

It is not a weakly prime, because it can be changed into another prime (4000159) 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, 2000084 + 2000085.

It is an arithmetic number, because the mean of its divisors is an integer number (2000085).

Almost surely, 2^4000169 is an apocalyptic number.

It is an amenable number.

4000169 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000169 is an equidigital number, since it uses as much as digits as its factorization.

4000169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 4000169 is about 2000.0422495537. The cubic root of 4000169 is about 158.7423407552.

The spelling of 4000169 in words is "four million, one hundred sixty-nine", and thus it is an aban number.