161045603 has 2 divisors, whose sum is σ = 161045604. Its totient is φ = 161045602.

The previous prime is 161045597. The next prime is 161045623. The reversal of 161045603 is 306540161.

161045603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (306540161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161045603 - 2⁸ = 161045347 is a prime.

It is not a weakly prime, because it can be changed into another prime (161045623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80522801 + 80522802.

It is an arithmetic number, because the mean of its divisors is an integer number (80522802).

Almost surely, 2^161045603 is an apocalyptic number.

161045603 is a deficient number, since it is larger than the sum of its proper divisors (1).

161045603 is an equidigital number, since it uses as much as digits as its factorization.

161045603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 161045603 is about 12690.3744231603. The cubic root of 161045603 is about 544.0635412280.

Adding to 161045603 its reverse (306540161), we get a palindrome (467585764).

The spelling of 161045603 in words is "one hundred sixty-one million, forty-five thousand, six hundred three".