163998206 has 8 divisors (see below), whose sum is σ = 248961384. Its totient is φ = 81011080.

The previous prime is 163998203. The next prime is 163998221. The reversal of 163998206 is 602899361.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163998203) 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, 493805 + ... + 494136.

It is an arithmetic number, because the mean of its divisors is an integer number (31120173).

Almost surely, 2^163998206 is an apocalyptic number.

163998206 is a deficient number, since it is larger than the sum of its proper divisors (84963178).

163998206 is an equidigital number, since it uses as much as digits as its factorization.

163998206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988026.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 163998206 is about 12806.1784307419. The cubic root of 163998206 is about 547.3683715733.

The spelling of 163998206 in words is "one hundred sixty-three million, nine hundred ninety-eight thousand, two hundred six".