164808309 has 4 divisors (see below), whose sum is σ = 219744416. Its totient is φ = 109872204.

The previous prime is 164808263. The next prime is 164808311. The reversal of 164808309 is 903808461.

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 not a de Polignac number, because 164808309 - 2⁸ = 164808053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164807309) 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, 27468049 + ... + 27468054.

It is an arithmetic number, because the mean of its divisors is an integer number (54936104).

Almost surely, 2^164808309 is an apocalyptic number.

It is an amenable number.

164808309 is a deficient number, since it is larger than the sum of its proper divisors (54936107).

164808309 is an equidigital number, since it uses as much as digits as its factorization.

164808309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54936106.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 164808309 is about 12837.7688482072. The cubic root of 164808309 is about 548.2681713098.

The spelling of 164808309 in words is "one hundred sixty-four million, eight hundred eight thousand, three hundred nine".