165499 has 4 divisors (see below), whose sum is σ = 166320. Its totient is φ = 164680.

The previous prime is 165479. The next prime is 165511. The reversal of 165499 is 994561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 165499 - 2⁹ = 164987 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (165449) 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, 129 + ... + 589.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2¹⁶⁵⁴⁹⁹ is an apocalyptic number.

165499 is a deficient number, since it is larger than the sum of its proper divisors (821).

165499 is an equidigital number, since it uses as much as digits as its factorization.

165499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

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

The square root of 165499 is about 406.8156830802. The cubic root of 165499 is about 54.9033011619.

The spelling of 165499 in words is "one hundred sixty-five thousand, four hundred ninety-nine".