163189045 has 4 divisors (see below), whose sum is σ = 195826860. Its totient is φ = 130551232.

The previous prime is 163189009. The next prime is 163189049. The reversal of 163189045 is 540981361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540981361 = 17 ⋅31822433.

It can be written as a sum of positive squares in 2 ways, for example, as 71470116 + 91718929 = 8454^2 + 9577^2 .

It is a cyclic number.

It is not a de Polignac number, because 163189045 - 2⁹ = 163188533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163188995 and 163189013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163189049) 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 in 3 ways as a sum of consecutive naturals, for example, 16318900 + ... + 16318909.

It is an arithmetic number, because the mean of its divisors is an integer number (48956715).

Almost surely, 2^163189045 is an apocalyptic number.

It is an amenable number.

163189045 is a deficient number, since it is larger than the sum of its proper divisors (32637815).

163189045 is an equidigital number, since it uses as much as digits as its factorization.

163189045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32637814.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 163189045 is about 12774.5467629971. The cubic root of 163189045 is about 546.4666552570.

The spelling of 163189045 in words is "one hundred sixty-three million, one hundred eighty-nine thousand, forty-five".