164520569 has 2 divisors, whose sum is σ = 164520570. Its totient is φ = 164520568.

The previous prime is 164520547. The next prime is 164520589. The reversal of 164520569 is 965025461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161671225 + 2849344 = 12715^2 + 1688^2 .

It is an emirp because it is prime and its reverse (965025461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164520569 - 2⁸ = 164520313 is a prime.

It is a super-2 number, since 2×164520569² = 54134035248167522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164520529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82260284 + 82260285.

It is an arithmetic number, because the mean of its divisors is an integer number (82260285).

Almost surely, 2^164520569 is an apocalyptic number.

It is an amenable number.

164520569 is a deficient number, since it is larger than the sum of its proper divisors (1).

164520569 is an equidigital number, since it uses as much as digits as its factorization.

164520569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 164520569 is about 12826.5571764211. The cubic root of 164520569 is about 547.9489103365.

The spelling of 164520569 in words is "one hundred sixty-four million, five hundred twenty thousand, five hundred sixty-nine".