161103423 has 16 divisors (see below), whose sum is σ = 232333920. Its totient is φ = 98709504.

The previous prime is 161103403. The next prime is 161103427. The reversal of 161103423 is 324301161.

It is not a de Polignac number, because 161103423 - 2⁶ = 161103359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161103423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161103427) 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 15 ways as a sum of consecutive naturals, for example, 223 + ... + 17951.

It is an arithmetic number, because the mean of its divisors is an integer number (14520870).

Almost surely, 2^161103423 is an apocalyptic number.

161103423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161103423 is a deficient number, since it is larger than the sum of its proper divisors (71230497).

161103423 is a wasteful number, since it uses less digits than its factorization.

161103423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17978.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 161103423 is about 12692.6523232932. The cubic root of 161103423 is about 544.1286449199.

Adding to 161103423 its reverse (324301161), we get a palindrome (485404584).

The spelling of 161103423 in words is "one hundred sixty-one million, one hundred three thousand, four hundred twenty-three".