65838709 has 2 divisors, whose sum is σ = 65838710. Its totient is φ = 65838708.

The previous prime is 65838701. The next prime is 65838737. The reversal of 65838709 is 90783856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59336209 + 6502500 = 7703^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 65838709 - 2³ = 65838701 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65838701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32919354 + 32919355.

It is an arithmetic number, because the mean of its divisors is an integer number (32919355).

Almost surely, 2^65838709 is an apocalyptic number.

It is an amenable number.

65838709 is a deficient number, since it is larger than the sum of its proper divisors (1).

65838709 is an equidigital number, since it uses as much as digits as its factorization.

65838709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 65838709 is about 8114.1055576077. The cubic root of 65838709 is about 403.7945337108.

The spelling of 65838709 in words is "sixty-five million, eight hundred thirty-eight thousand, seven hundred nine".