65444471 has 2 divisors, whose sum is σ = 65444472. Its totient is φ = 65444470.

The previous prime is 65444447. The next prime is 65444473. The reversal of 65444471 is 17444456.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65444471 is a prime.

It is a super-3 number, since 3×65444471³ (a number of 24 digits) contains 333 as substring.

Together with 65444473, 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 (65444473) 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, 32722235 + 32722236.

It is an arithmetic number, because the mean of its divisors is an integer number (32722236).

Almost surely, 2^65444471 is an apocalyptic number.

65444471 is a deficient number, since it is larger than the sum of its proper divisors (1).

65444471 is an equidigital number, since it uses as much as digits as its factorization.

65444471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 35.

The square root of 65444471 is about 8089.7757076448. The cubic root of 65444471 is about 402.9869543236.

The spelling of 65444471 in words is "sixty-five million, four hundred forty-four thousand, four hundred seventy-one".