165403005 has 16 divisors (see below), whose sum is σ = 276151680. Its totient is φ = 84379328.

The previous prime is 165403001. The next prime is 165403009. The reversal of 165403005 is 500304561.

It is an interprime number because it is at equal distance from previous prime (165403001) and next prime (165403009).

It is a cyclic number.

It is not a de Polignac number, because 165403005 - 2² = 165403001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165403001) 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 15 ways as a sum of consecutive naturals, for example, 239370 + ... + 240059.

It is an arithmetic number, because the mean of its divisors is an integer number (17259480).

Almost surely, 2^165403005 is an apocalyptic number.

165403005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165403005 is a deficient number, since it is larger than the sum of its proper divisors (110748675).

165403005 is a wasteful number, since it uses less digits than its factorization.

165403005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479460.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 165403005 is about 12860.9099600300. The cubic root of 165403005 is about 548.9268385359.

Adding to 165403005 its reverse (500304561), we get a palindrome (665707566).

The spelling of 165403005 in words is "one hundred sixty-five million, four hundred three thousand, five".