163689323 has 4 divisors (see below), whose sum is σ = 187073520. Its totient is φ = 140305128.

The previous prime is 163689307. The next prime is 163689371. The reversal of 163689323 is 323986361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163689323 - 2⁴ = 163689307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163689373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11692088 + ... + 11692101.

It is an arithmetic number, because the mean of its divisors is an integer number (46768380).

Almost surely, 2^163689323 is an apocalyptic number.

163689323 is a deficient number, since it is larger than the sum of its proper divisors (23384197).

163689323 is an equidigital number, since it uses as much as digits as its factorization.

163689323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23384196.

The product of its digits is 139968, while the sum is 41.

The square root of 163689323 is about 12794.1128258274. The cubic root of 163689323 is about 547.0245079686.

The spelling of 163689323 in words is "one hundred sixty-three million, six hundred eighty-nine thousand, three hundred twenty-three".