163103993 has 4 divisors (see below), whose sum is σ = 175650468. Its totient is φ = 150557520.

The previous prime is 163103939. The next prime is 163104013. The reversal of 163103993 is 399301361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62141689 + 100962304 = 7883^2 + 10048^2 .

It is a cyclic number.

It is not a de Polignac number, because 163103993 - 2¹⁰ = 163102969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163103093) 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, 6273218 + ... + 6273243.

It is an arithmetic number, because the mean of its divisors is an integer number (43912617).

Almost surely, 2^163103993 is an apocalyptic number.

163103993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163103993 is a deficient number, since it is larger than the sum of its proper divisors (12546475).

163103993 is a wasteful number, since it uses less digits than its factorization.

163103993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12546474.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 163103993 is about 12771.2173656234. The cubic root of 163103993 is about 546.3717016632.

The spelling of 163103993 in words is "one hundred sixty-three million, one hundred three thousand, nine hundred ninety-three".