65500109 has 2 divisors, whose sum is σ = 65500110. Its totient is φ = 65500108.

The previous prime is 65500081. The next prime is 65500121. The reversal of 65500109 is 90100556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48302500 + 17197609 = 6950^2 + 4147^2 .

It is a cyclic number.

It is not a de Polignac number, because 65500109 - 2²⁴ = 48722893 is a prime.

It is a super-3 number, since 3×65500109³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65500139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750054 + 32750055.

It is an arithmetic number, because the mean of its divisors is an integer number (32750055).

Almost surely, 2^65500109 is an apocalyptic number.

It is an amenable number.

65500109 is a deficient number, since it is larger than the sum of its proper divisors (1).

65500109 is an equidigital number, since it uses as much as digits as its factorization.

65500109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 65500109 is about 8093.2137621590. The cubic root of 65500109 is about 403.1011225486.

The spelling of 65500109 in words is "sixty-five million, five hundred thousand, one hundred nine".