163875389 has 4 divisors (see below), whose sum is σ = 165564924. Its totient is φ = 162185856.

The previous prime is 163875373. The next prime is 163875403. The reversal of 163875389 is 983578361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983578361 = 79 ⋅12450359.

It can be written as a sum of positive squares in 2 ways, for example, as 50623225 + 113252164 = 7115^2 + 10642^2 .

It is a cyclic number.

It is not a de Polignac number, because 163875389 - 2⁴ = 163875373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163875329) 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, 844622 + ... + 844815.

It is an arithmetic number, because the mean of its divisors is an integer number (41391231).

Almost surely, 2^163875389 is an apocalyptic number.

It is an amenable number.

163875389 is a deficient number, since it is larger than the sum of its proper divisors (1689535).

163875389 is an equidigital number, since it uses as much as digits as its factorization.

163875389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689534.

The product of its digits is 1088640, while the sum is 50.

The square root of 163875389 is about 12801.3823081728. The cubic root of 163875389 is about 547.2316974563.

The spelling of 163875389 in words is "one hundred sixty-three million, eight hundred seventy-five thousand, three hundred eighty-nine".