163206845 has 4 divisors (see below), whose sum is σ = 195848220. Its totient is φ = 130565472.

The previous prime is 163206829. The next prime is 163206853. The reversal of 163206845 is 548602361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548602361 = 83 ⋅6609667.

It can be written as a sum of positive squares in 2 ways, for example, as 26152996 + 137053849 = 5114^2 + 11707^2 .

It is a cyclic number.

It is not a de Polignac number, because 163206845 - 2⁴ = 163206829 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16320680 + ... + 16320689.

It is an arithmetic number, because the mean of its divisors is an integer number (48962055).

Almost surely, 2^163206845 is an apocalyptic number.

It is an amenable number.

163206845 is a deficient number, since it is larger than the sum of its proper divisors (32641375).

163206845 is an equidigital number, since it uses as much as digits as its factorization.

163206845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32641374.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 163206845 is about 12775.2434419075. The cubic root of 163206845 is about 546.4865233244.

The spelling of 163206845 in words is "one hundred sixty-three million, two hundred six thousand, eight hundred forty-five".