161044603 has 2 divisors, whose sum is σ = 161044604. Its totient is φ = 161044602.

The previous prime is 161044591. The next prime is 161044633. The reversal of 161044603 is 306440161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161044603 is a prime.

It is not a weakly prime, because it can be changed into another prime (161044633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80522301 + 80522302.

It is an arithmetic number, because the mean of its divisors is an integer number (80522302).

Almost surely, 2^161044603 is an apocalyptic number.

161044603 is a deficient number, since it is larger than the sum of its proper divisors (1).

161044603 is an equidigital number, since it uses as much as digits as its factorization.

161044603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 161044603 is about 12690.3350231584. The cubic root of 161044603 is about 544.0624151191.

Adding to 161044603 its reverse (306440161), we get a palindrome (467484764).

The spelling of 161044603 in words is "one hundred sixty-one million, forty-four thousand, six hundred three".