65555489 has 2 divisors, whose sum is σ = 65555490. Its totient is φ = 65555488.

The previous prime is 65555473. The next prime is 65555537. The reversal of 65555489 is 98455556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39627025 + 25928464 = 6295^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 65555489 - 2⁴ = 65555473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65555449) 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, 32777744 + 32777745.

It is an arithmetic number, because the mean of its divisors is an integer number (32777745).

Almost surely, 2^65555489 is an apocalyptic number.

It is an amenable number.

65555489 is a deficient number, since it is larger than the sum of its proper divisors (1).

65555489 is an equidigital number, since it uses as much as digits as its factorization.

65555489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080000, while the sum is 47.

The square root of 65555489 is about 8096.6344242531. The cubic root of 65555489 is about 403.2146971769.

The spelling of 65555489 in words is "sixty-five million, five hundred fifty-five thousand, four hundred eighty-nine".