164864309 has 4 divisors (see below), whose sum is σ = 164909004. Its totient is φ = 164819616.

The previous prime is 164864303. The next prime is 164864327. The reversal of 164864309 is 903468461.

164864309 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 an emirpimes, since its reverse is a distinct semiprime: 903468461 = 7 ⋅129066923.

It can be written as a sum of positive squares in 2 ways, for example, as 27857284 + 137007025 = 5278^2 + 11705^2 .

It is a cyclic number.

It is not a de Polignac number, because 164864309 - 2²⁰ = 163815733 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 (164864303) 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, 16262 + ... + 24375.

It is an arithmetic number, because the mean of its divisors is an integer number (41227251).

Almost surely, 2^164864309 is an apocalyptic number.

It is an amenable number.

164864309 is a deficient number, since it is larger than the sum of its proper divisors (44695).

164864309 is an equidigital number, since it uses as much as digits as its factorization.

164864309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44694.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 164864309 is about 12839.9497273159. The cubic root of 164864309 is about 548.3302627196.

The spelling of 164864309 in words is "one hundred sixty-four million, eight hundred sixty-four thousand, three hundred nine".