161110403 has 2 divisors, whose sum is σ = 161110404. Its totient is φ = 161110402.

The previous prime is 161110337. The next prime is 161110447. The reversal of 161110403 is 304011161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161110403 - 2¹⁶ = 161044867 is a prime.

It is not a weakly prime, because it can be changed into another prime (161110483) 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 as a sum of consecutive naturals, namely, 80555201 + 80555202.

It is an arithmetic number, because the mean of its divisors is an integer number (80555202).

Almost surely, 2^161110403 is an apocalyptic number.

161110403 is a deficient number, since it is larger than the sum of its proper divisors (1).

161110403 is an equidigital number, since it uses as much as digits as its factorization.

161110403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 161110403 is about 12692.9272825460. The cubic root of 161110403 is about 544.1365031496.

Adding to 161110403 its reverse (304011161), we get a palindrome (465121564).

The spelling of 161110403 in words is "one hundred sixty-one million, one hundred ten thousand, four hundred three".