65689471 has 2 divisors, whose sum is σ = 65689472. Its totient is φ = 65689470.

The previous prime is 65689469. The next prime is 65689483. The reversal of 65689471 is 17498656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65689471 - 2¹ = 65689469 is a prime.

It is a super-3 number, since 3×65689471³ (a number of 24 digits) contains 333 as substring.

Together with 65689469, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65689451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32844735 + 32844736.

It is an arithmetic number, because the mean of its divisors is an integer number (32844736).

Almost surely, 2^65689471 is an apocalyptic number.

65689471 is a deficient number, since it is larger than the sum of its proper divisors (1).

65689471 is an equidigital number, since it uses as much as digits as its factorization.

65689471 is an odious number, because the sum of its binary digits is odd.

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

The square root of 65689471 is about 8104.9041326841. The cubic root of 65689471 is about 403.4892063486.

The spelling of 65689471 in words is "sixty-five million, six hundred eighty-nine thousand, four hundred seventy-one".