161996 has 6 divisors (see below), whose sum is σ = 283500. Its totient is φ = 80996.

The previous prime is 161983. The next prime is 161999. The reversal of 161996 is 699161.

It is a happy number.

161996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (161999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20246 + ... + 20253.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2¹⁶¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

161996 is a deficient number, since it is larger than the sum of its proper divisors (121504).

161996 is a wasteful number, since it uses less digits than its factorization.

161996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40503 (or 40501 counting only the distinct ones).

The product of its digits is 2916, while the sum is 32.

The square root of 161996 is about 402.4872668793. The cubic root of 161996 is about 54.5131691095.

The spelling of 161996 in words is "one hundred sixty-one thousand, nine hundred ninety-six".