220420169 has 2 divisors, whose sum is σ = 220420170. Its totient is φ = 220420168.

The previous prime is 220420157. The next prime is 220420219. The reversal of 220420169 is 961024022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190302025 + 30118144 = 13795^2 + 5488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220420169 is a prime.

It is a super-2 number, since 2×220420169² = 97170101803977122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220420129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110210084 + 110210085.

It is an arithmetic number, because the mean of its divisors is an integer number (110210085).

Almost surely, 2^220420169 is an apocalyptic number.

It is an amenable number.

220420169 is a deficient number, since it is larger than the sum of its proper divisors (1).

220420169 is an equidigital number, since it uses as much as digits as its factorization.

220420169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 220420169 is about 14846.5541119817. The cubic root of 220420169 is about 604.0651445386.

The spelling of 220420169 in words is "two hundred twenty million, four hundred twenty thousand, one hundred sixty-nine".