64109 has 2 divisors, whose sum is σ = 64110. Its totient is φ = 64108.

The previous prime is 64091. The next prime is 64123. The reversal of 64109 is 90146.

Together with previous prime (64091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64009 + 100 = 253^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 64109 - 2⁸ = 63853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32054 + 32055.

It is an arithmetic number, because the mean of its divisors is an integer number (32055).

2⁶⁴¹⁰⁹ is an apocalyptic number.

It is an amenable number.

64109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64109 is an equidigital number, since it uses as much as digits as its factorization.

64109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 64109 is about 253.1975513310. The cubic root of 64109 is about 40.0226954538.

The spelling of 64109 in words is "sixty-four thousand, one hundred nine".