161944 has 16 divisors (see below), whose sum is σ = 313920. Its totient is φ = 78240.

The previous prime is 161923. The next prime is 161947. The reversal of 161944 is 449161.

161944 = 93² + 94² + ... + 108².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (19620).

2¹⁶¹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

161944 is a deficient number, since it is larger than the sum of its proper divisors (151976).

161944 is a wasteful number, since it uses less digits than its factorization.

161944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 686 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 161944 is about 402.4226633777. The cubic root of 161944 is about 54.5073356565.

The spelling of 161944 in words is "one hundred sixty-one thousand, nine hundred forty-four".