398320163 has 4 divisors (see below), whose sum is σ = 398438520. Its totient is φ = 398201808.

The previous prime is 398320157. The next prime is 398320171. The reversal of 398320163 is 361023893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361023893 = 23 ⋅15696691.

It is a cyclic number.

It is not a de Polignac number, because 398320163 - 2⁶ = 398320099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398325163) 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 3 ways as a sum of consecutive naturals, for example, 53978 + ... + 60911.

It is an arithmetic number, because the mean of its divisors is an integer number (99609630).

Almost surely, 2^398320163 is an apocalyptic number.

398320163 is a deficient number, since it is larger than the sum of its proper divisors (118357).

398320163 is a wasteful number, since it uses less digits than its factorization.

398320163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118356.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 398320163 is about 19957.9598907303. The cubic root of 398320163 is about 735.7734237530.

The spelling of 398320163 in words is "three hundred ninety-eight million, three hundred twenty thousand, one hundred sixty-three".