163405003 has 4 divisors (see below), whose sum is σ = 173017080. Its totient is φ = 153792928.

The previous prime is 163405001. The next prime is 163405063. The reversal of 163405003 is 300504361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163405003 - 2¹ = 163405001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163405001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4806013 + ... + 4806046.

It is an arithmetic number, because the mean of its divisors is an integer number (43254270).

Almost surely, 2^163405003 is an apocalyptic number.

163405003 is a deficient number, since it is larger than the sum of its proper divisors (9612077).

163405003 is an equidigital number, since it uses as much as digits as its factorization.

163405003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9612076.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 163405003 is about 12782.9966361570. The cubic root of 163405003 is about 546.7076065331.

Adding to 163405003 its reverse (300504361), we get a palindrome (463909364).

The spelling of 163405003 in words is "one hundred sixty-three million, four hundred five thousand, three".