165673369 has 6 divisors (see below), whose sum is σ = 174852330. Its totient is φ = 156953376.

The previous prime is 165673327. The next prime is 165673421. The reversal of 165673369 is 963376561.

It can be written as a sum of positive squares in only one way, i.e., 138768400 + 26904969 = 11780^2 + 5187^2 .

It is not a de Polignac number, because 165673369 - 2⁷ = 165673241 is a prime.

It is a super-2 number, since 2×165673369² = 54895330391620322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165670369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229104 + ... + 229825.

It is an arithmetic number, because the mean of its divisors is an integer number (29142055).

Almost surely, 2^165673369 is an apocalyptic number.

165673369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

165673369 is a deficient number, since it is larger than the sum of its proper divisors (9178961).

165673369 is an equidigital number, since it uses as much as digits as its factorization.

165673369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458967 (or 458948 counting only the distinct ones).

The product of its digits is 612360, while the sum is 46.

The square root of 165673369 is about 12871.4167440884. The cubic root of 165673369 is about 549.2257635092.

The spelling of 165673369 in words is "one hundred sixty-five million, six hundred seventy-three thousand, three hundred sixty-nine".