161103443 has 4 divisors (see below), whose sum is σ = 163508040. Its totient is φ = 158698848.

The previous prime is 161103427. The next prime is 161103463. The reversal of 161103443 is 344301161.

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 161103443 - 2⁴ = 161103427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161103403) 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, 1202198 + ... + 1202331.

It is an arithmetic number, because the mean of its divisors is an integer number (40877010).

Almost surely, 2^161103443 is an apocalyptic number.

161103443 is a deficient number, since it is larger than the sum of its proper divisors (2404597).

161103443 is an equidigital number, since it uses as much as digits as its factorization.

161103443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404596.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 161103443 is about 12692.6531111506. The cubic root of 161103443 is about 544.1286674367.

The spelling of 161103443 in words is "one hundred sixty-one million, one hundred three thousand, four hundred forty-three".