161329 has 8 divisors (see below), whose sum is σ = 194240. Its totient is φ = 130896.

The previous prime is 161323. The next prime is 161333. The reversal of 161329 is 923161.

161329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161329 - 2⁷ = 161201 is a prime.

It is a Duffinian number.

161329 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (161323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474 + ... + 739.

It is an arithmetic number, because the mean of its divisors is an integer number (24280).

2¹⁶¹³²⁹ is an apocalyptic number.

161329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

161329 is a deficient number, since it is larger than the sum of its proper divisors (32911).

161329 is a wasteful number, since it uses less digits than its factorization.

161329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239.

The product of its digits is 324, while the sum is 22.

The square root of 161329 is about 401.6578145636. The cubic root of 161329 is about 54.4382489441.

The spelling of 161329 in words is "one hundred sixty-one thousand, three hundred twenty-nine".