65538647 has 2 divisors, whose sum is σ = 65538648. Its totient is φ = 65538646.

The previous prime is 65538611. The next prime is 65538653. The reversal of 65538647 is 74683556.

65538647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65538647 - 2¹⁰ = 65537623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65538598 and 65538607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65538607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32769323 + 32769324.

It is an arithmetic number, because the mean of its divisors is an integer number (32769324).

Almost surely, 2^65538647 is an apocalyptic number.

65538647 is a deficient number, since it is larger than the sum of its proper divisors (1).

65538647 is an equidigital number, since it uses as much as digits as its factorization.

65538647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 44.

The square root of 65538647 is about 8095.5942956648. The cubic root of 65538647 is about 403.1801639711.

The spelling of 65538647 in words is "sixty-five million, five hundred thirty-eight thousand, six hundred forty-seven".