163918103 has 4 divisors (see below), whose sum is σ = 168348360. Its totient is φ = 159487848.

The previous prime is 163918099. The next prime is 163918133. The reversal of 163918103 is 301819361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301819361 = 9613 ⋅31397.

It is a cyclic number.

It is not a de Polignac number, because 163918103 - 2² = 163918099 is a prime.

It is a super-2 number, since 2×163918103² = 53738288982237218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163918103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163918133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215073 + ... + 2215146.

It is an arithmetic number, because the mean of its divisors is an integer number (42087090).

Almost surely, 2^163918103 is an apocalyptic number.

163918103 is a deficient number, since it is larger than the sum of its proper divisors (4430257).

163918103 is an equidigital number, since it uses as much as digits as its factorization.

163918103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430256.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 163918103 is about 12803.0505349311. The cubic root of 163918103 is about 547.2792385063.

The spelling of 163918103 in words is "one hundred sixty-three million, nine hundred eighteen thousand, one hundred three".