65543389 has 2 divisors, whose sum is σ = 65543390. Its totient is φ = 65543388.

The previous prime is 65543327. The next prime is 65543417. The reversal of 65543389 is 98334556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55995289 + 9548100 = 7483^2 + 3090^2 .

It is a cyclic number.

It is not a de Polignac number, because 65543389 - 2²³ = 57154781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65543089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32771694 + 32771695.

It is an arithmetic number, because the mean of its divisors is an integer number (32771695).

Almost surely, 2^65543389 is an apocalyptic number.

It is an amenable number.

65543389 is a deficient number, since it is larger than the sum of its proper divisors (1).

65543389 is an equidigital number, since it uses as much as digits as its factorization.

65543389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 65543389 is about 8095.8871657157. The cubic root of 65543389 is about 403.1898876701.

It can be divided in two parts, 655 and 43389, that added together give a palindrome (44044).

The spelling of 65543389 in words is "sixty-five million, five hundred forty-three thousand, three hundred eighty-nine".