161984 has 14 divisors (see below), whose sum is σ = 321564. Its totient is φ = 80960.

The previous prime is 161983. The next prime is 161999. The reversal of 161984 is 489161.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161984.

It is not an unprimeable number, because it can be changed into a prime (161983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202 + ... + 1329.

2¹⁶¹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

161984 is a deficient number, since it is larger than the sum of its proper divisors (159580).

161984 is an equidigital number, since it uses as much as digits as its factorization.

161984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543 (or 2533 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 161984 is about 402.4723592994. The cubic root of 161984 is about 54.5118230389.

The spelling of 161984 in words is "one hundred sixty-one thousand, nine hundred eighty-four".