164865593 has 2 divisors, whose sum is σ = 164865594. Its totient is φ = 164865592.

The previous prime is 164865583. The next prime is 164865619. The reversal of 164865593 is 395568461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120736144 + 44129449 = 10988^2 + 6643^2 .

It is a cyclic number.

It is not a de Polignac number, because 164865593 - 2⁴ = 164865577 is a prime.

It is not a weakly prime, because it can be changed into another prime (164865523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82432796 + 82432797.

It is an arithmetic number, because the mean of its divisors is an integer number (82432797).

Almost surely, 2^164865593 is an apocalyptic number.

It is an amenable number.

164865593 is a deficient number, since it is larger than the sum of its proper divisors (1).

164865593 is an equidigital number, since it uses as much as digits as its factorization.

164865593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 47.

The square root of 164865593 is about 12839.9997274143. Note that the first 3 decimals coincide. The cubic root of 164865593 is about 548.3316862220.

The spelling of 164865593 in words is "one hundred sixty-four million, eight hundred sixty-five thousand, five hundred ninety-three".