65109 has 8 divisors (see below), whose sum is σ = 94752. Its totient is φ = 39440.

The previous prime is 65101. The next prime is 65111. The reversal of 65109 is 90156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65109 - 2³ = 65101 is a prime.

It is an Ulam number.

65109 is a lucky number.

It is a plaindrome in base 15.

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65109.

It is not an unprimeable number, because it can be changed into a prime (65101) 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 in 7 ways as a sum of consecutive naturals, for example, 954 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (11844).

2⁶⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

65109 is a deficient number, since it is larger than the sum of its proper divisors (29643).

65109 is a wasteful number, since it uses less digits than its factorization.

65109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 65109 is about 255.1646527245. The cubic root of 65109 is about 40.2297198608.

It can be divided in two parts, 6 and 5109, that added together give a palindrome (5115).

The spelling of 65109 in words is "sixty-five thousand, one hundred nine".