163969329 has 8 divisors (see below), whose sum is σ = 218738880. Its totient is φ = 109256336.

The previous prime is 163969321. The next prime is 163969331. The reversal of 163969329 is 923969361.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 163969329 - 2³ = 163969321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163969321) 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, 6834 + ... + 19355.

It is an arithmetic number, because the mean of its divisors is an integer number (27342360).

Almost surely, 2^163969329 is an apocalyptic number.

It is an amenable number.

163969329 is a deficient number, since it is larger than the sum of its proper divisors (54769551).

163969329 is a wasteful number, since it uses less digits than its factorization.

163969329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28279.

The product of its digits is 472392, while the sum is 48.

The square root of 163969329 is about 12805.0509175091. The cubic root of 163969329 is about 547.3362425952.

The spelling of 163969329 in words is "one hundred sixty-three million, nine hundred sixty-nine thousand, three hundred twenty-nine".