161232173 has 2 divisors, whose sum is σ = 161232174. Its totient is φ = 161232172.

The previous prime is 161232167. The next prime is 161232179. The reversal of 161232173 is 371232161.

161232173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (161232167) and next prime (161232179).

It can be written as a sum of positive squares in only one way, i.e., 151856329 + 9375844 = 12323^2 + 3062^2 .

It is a cyclic number.

It is not a de Polignac number, because 161232173 - 2¹⁰ = 161231149 is a prime.

It is a super-2 number, since 2×161232173² = 51991627220603858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161232179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80616086 + 80616087.

It is an arithmetic number, because the mean of its divisors is an integer number (80616087).

Almost surely, 2^161232173 is an apocalyptic number.

It is an amenable number.

161232173 is a deficient number, since it is larger than the sum of its proper divisors (1).

161232173 is an equidigital number, since it uses as much as digits as its factorization.

161232173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 161232173 is about 12697.7231423590. The cubic root of 161232173 is about 544.2735578533.

The spelling of 161232173 in words is "one hundred sixty-one million, two hundred thirty-two thousand, one hundred seventy-three".