163983021 has 8 divisors (see below), whose sum is σ = 218722560. Its totient is φ = 109282752.

The previous prime is 163983019. The next prime is 163983073. The reversal of 163983021 is 120389361.

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

It is not a de Polignac number, because 163983021 - 2¹ = 163983019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163983121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941 + ... + 18213.

It is an arithmetic number, because the mean of its divisors is an integer number (27340320).

Almost surely, 2^163983021 is an apocalyptic number.

It is an amenable number.

163983021 is a deficient number, since it is larger than the sum of its proper divisors (54739539).

163983021 is a wasteful number, since it uses less digits than its factorization.

163983021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19635.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 163983021 is about 12805.5855391310. The cubic root of 163983021 is about 547.3514769875.

The spelling of 163983021 in words is "one hundred sixty-three million, nine hundred eighty-three thousand, twenty-one".