163242809 has 8 divisors (see below), whose sum is σ = 167261760. Its totient is φ = 159258736.

The previous prime is 163242803. The next prime is 163242811. The reversal of 163242809 is 908242361.

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 163242809 - 2⁸ = 163242553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163242803) 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, 884 + ... + 18090.

It is an arithmetic number, because the mean of its divisors is an integer number (20907720).

Almost surely, 2^163242809 is an apocalyptic number.

It is an amenable number.

163242809 is a deficient number, since it is larger than the sum of its proper divisors (4018951).

163242809 is a wasteful number, since it uses less digits than its factorization.

163242809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17439.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 163242809 is about 12776.6509305060. The cubic root of 163242809 is about 546.5266613425.

The spelling of 163242809 in words is "one hundred sixty-three million, two hundred forty-two thousand, eight hundred nine".