164834209 has 4 divisors (see below), whose sum is σ = 164911104. Its totient is φ = 164757316.

The previous prime is 164834203. The next prime is 164834213. The reversal of 164834209 is 902438461.

164834209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164834209 - 2¹⁷ = 164703137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164834203) 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, 35137 + ... + 39550.

It is an arithmetic number, because the mean of its divisors is an integer number (41227776).

Almost surely, 2^164834209 is an apocalyptic number.

It is an amenable number.

164834209 is a deficient number, since it is larger than the sum of its proper divisors (76895).

164834209 is an equidigital number, since it uses as much as digits as its factorization.

164834209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76894.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 164834209 is about 12838.7775508418. Note that the first 3 decimals coincide. The cubic root of 164834209 is about 548.2968903348.

The spelling of 164834209 in words is "one hundred sixty-four million, eight hundred thirty-four thousand, two hundred nine".