165949 has 8 divisors (see below), whose sum is σ = 192128. Its totient is φ = 140400.

The previous prime is 165947. The next prime is 165961. The reversal of 165949 is 949561.

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 165949 - 2¹ = 165947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165941) 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, 979 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (24016).

2¹⁶⁵⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

165949 is a deficient number, since it is larger than the sum of its proper divisors (26179).

165949 is a wasteful number, since it uses less digits than its factorization.

165949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its digits is 9720, while the sum is 34.

The square root of 165949 is about 407.3683836529. The cubic root of 165949 is about 54.9530177293.

The spelling of 165949 in words is "one hundred sixty-five thousand, nine hundred forty-nine".