161223163 has 2 divisors, whose sum is σ = 161223164. Its totient is φ = 161223162.

The previous prime is 161223131. The next prime is 161223187. The reversal of 161223163 is 361322161.

It is a strong prime.

It is an emirp because it is prime and its reverse (361322161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161223163 - 2⁵ = 161223131 is a prime.

It is not a weakly prime, because it can be changed into another prime (161223263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80611581 + 80611582.

It is an arithmetic number, because the mean of its divisors is an integer number (80611582).

Almost surely, 2^161223163 is an apocalyptic number.

161223163 is a deficient number, since it is larger than the sum of its proper divisors (1).

161223163 is an equidigital number, since it uses as much as digits as its factorization.

161223163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 161223163 is about 12697.3683493864. The cubic root of 161223163 is about 544.2634192728.

The spelling of 161223163 in words is "one hundred sixty-one million, two hundred twenty-three thousand, one hundred sixty-three".