163689609 has 8 divisors (see below), whose sum is σ = 219919392. Its totient is φ = 108293120.

The previous prime is 163689553. The next prime is 163689611. The reversal of 163689609 is 906986361.

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 163689609 - 2¹¹ = 163687561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163689619) 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, 207864 + ... + 208649.

It is an arithmetic number, because the mean of its divisors is an integer number (27489924).

Almost surely, 2^163689609 is an apocalyptic number.

It is an amenable number.

163689609 is a deficient number, since it is larger than the sum of its proper divisors (56229783).

163689609 is a wasteful number, since it uses less digits than its factorization.

163689609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416647.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 163689609 is about 12794.1240028382. The cubic root of 163689609 is about 547.0248265577.

The spelling of 163689609 in words is "one hundred sixty-three million, six hundred eighty-nine thousand, six hundred nine".