164798809 has 8 divisors (see below), whose sum is σ = 192185600. Its totient is φ = 141255828.

The previous prime is 164798801. The next prime is 164798813. The reversal of 164798809 is 908897461.

It is a happy number.

It is not a de Polignac number, because 164798809 - 2³ = 164798801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164798801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239889 + ... + 240574.

It is an arithmetic number, because the mean of its divisors is an integer number (24023200).

Almost surely, 2^164798809 is an apocalyptic number.

It is an amenable number.

164798809 is a deficient number, since it is larger than the sum of its proper divisors (27386791).

164798809 is an frugal number, since it uses more digits than its factorization.

164798809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480484 (or 480470 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 164798809 is about 12837.3988408867. The cubic root of 164798809 is about 548.2576365503.

The spelling of 164798809 in words is "one hundred sixty-four million, seven hundred ninety-eight thousand, eight hundred nine".