164454509 has 2 divisors, whose sum is σ = 164454510. Its totient is φ = 164454508.

The previous prime is 164454491. The next prime is 164454527. The reversal of 164454509 is 905454461.

164454509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (164454491) and next prime (164454527).

It can be written as a sum of positive squares in only one way, i.e., 163277284 + 1177225 = 12778^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 164454509 - 2²⁴ = 147677293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164454539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82227254 + 82227255.

It is an arithmetic number, because the mean of its divisors is an integer number (82227255).

Almost surely, 2^164454509 is an apocalyptic number.

It is an amenable number.

164454509 is a deficient number, since it is larger than the sum of its proper divisors (1).

164454509 is an equidigital number, since it uses as much as digits as its factorization.

164454509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 164454509 is about 12823.9817919397. The cubic root of 164454509 is about 547.8755611475.

The spelling of 164454509 in words is "one hundred sixty-four million, four hundred fifty-four thousand, five hundred nine".