164904109 has 4 divisors (see below), whose sum is σ = 164943520. Its totient is φ = 164864700.

The previous prime is 164904107. The next prime is 164904127. The reversal of 164904109 is 901409461.

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 164904109 - 2¹ = 164904107 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 (164904107) 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, 12567 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (41235880).

Almost surely, 2^164904109 is an apocalyptic number.

It is an amenable number.

164904109 is a deficient number, since it is larger than the sum of its proper divisors (39411).

164904109 is an equidigital number, since it uses as much as digits as its factorization.

164904109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39410.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 164904109 is about 12841.4994840945. The cubic root of 164904109 is about 548.3743834244.

The spelling of 164904109 in words is "one hundred sixty-four million, nine hundred four thousand, one hundred nine".