40169 has 2 divisors, whose sum is σ = 40170. Its totient is φ = 40168.

The previous prime is 40163. The next prime is 40177. The reversal of 40169 is 96104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40000 + 169 = 200^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 40169 - 2⁴ = 40153 is a prime.

It is a super-2 number, since 2×40169² = 3227097122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40169.

It is not a weakly prime, because it can be changed into another prime (40163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20084 + 20085.

It is an arithmetic number, because the mean of its divisors is an integer number (20085).

2⁴⁰¹⁶⁹ is an apocalyptic number.

It is an amenable number.

40169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40169 is an equidigital number, since it uses as much as digits as its factorization.

40169 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 40169 is about 200.4220546746. The cubic root of 40169 is about 34.2476155834.

The spelling of 40169 in words is "forty thousand, one hundred sixty-nine".