163690689 has 8 divisors (see below), whose sum is σ = 218873952. Its totient is φ = 108817280.

The previous prime is 163690687. The next prime is 163690693. The reversal of 163690689 is 986096361.

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 163690689 - 2¹ = 163690687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163690687) 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, 76227 + ... + 78344.

It is an arithmetic number, because the mean of its divisors is an integer number (27359244).

Almost surely, 2^163690689 is an apocalyptic number.

It is an amenable number.

163690689 is a deficient number, since it is larger than the sum of its proper divisors (55183263).

163690689 is a wasteful number, since it uses less digits than its factorization.

163690689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154927.

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

The square root of 163690689 is about 12794.1662096441. The cubic root of 163690689 is about 547.0260296182.

The spelling of 163690689 in words is "one hundred sixty-three million, six hundred ninety thousand, six hundred eighty-nine".