161443603 has 8 divisors (see below), whose sum is σ = 162543888. Its totient is φ = 160347264.

The previous prime is 161443591. The next prime is 161443621. The reversal of 161443603 is 306344161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161443603 - 2¹³ = 161435411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161443663) 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 7 ways as a sum of consecutive naturals, for example, 143200 + ... + 144322.

It is an arithmetic number, because the mean of its divisors is an integer number (20317986).

Almost surely, 2^161443603 is an apocalyptic number.

161443603 is a deficient number, since it is larger than the sum of its proper divisors (1100285).

161443603 is a wasteful number, since it uses less digits than its factorization.

161443603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 161443603 is about 12706.0459231029. The cubic root of 161443603 is about 544.5113629425.

Adding to 161443603 its reverse (306344161), we get a palindrome (467787764).

The spelling of 161443603 in words is "one hundred sixty-one million, four hundred forty-three thousand, six hundred three".