161422169 has 2 divisors, whose sum is σ = 161422170. Its totient is φ = 161422168.

The previous prime is 161422159. The next prime is 161422181. The reversal of 161422169 is 961224161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112254025 + 49168144 = 10595^2 + 7012^2 .

It is a cyclic number.

It is not a de Polignac number, because 161422169 - 2⁸ = 161421913 is a prime.

It is a super-2 number, since 2×161422169² = 52114233289329122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161422109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80711084 + 80711085.

It is an arithmetic number, because the mean of its divisors is an integer number (80711085).

Almost surely, 2^161422169 is an apocalyptic number.

It is an amenable number.

161422169 is a deficient number, since it is larger than the sum of its proper divisors (1).

161422169 is an equidigital number, since it uses as much as digits as its factorization.

161422169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 161422169 is about 12705.2024383715. The cubic root of 161422169 is about 544.4872645930.

The spelling of 161422169 in words is "one hundred sixty-one million, four hundred twenty-two thousand, one hundred sixty-nine".