65280109 has 2 divisors, whose sum is σ = 65280110. Its totient is φ = 65280108.

The previous prime is 65280091. The next prime is 65280139. The reversal of 65280109 is 90108256.

65280109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (65280091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64048009 + 1232100 = 8003^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 65280109 - 2¹³ = 65271917 is a prime.

It is a super-2 number, since 2×65280109² = 8522985262103762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65280139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32640054 + 32640055.

It is an arithmetic number, because the mean of its divisors is an integer number (32640055).

Almost surely, 2^65280109 is an apocalyptic number.

It is an amenable number.

65280109 is a deficient number, since it is larger than the sum of its proper divisors (1).

65280109 is an equidigital number, since it uses as much as digits as its factorization.

65280109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 65280109 is about 8079.6106960670. The cubic root of 65280109 is about 402.6493079291.

The spelling of 65280109 in words is "sixty-five million, two hundred eighty thousand, one hundred nine".