65989747 has 2 divisors, whose sum is σ = 65989748. Its totient is φ = 65989746.

The previous prime is 65989741. The next prime is 65989771. The reversal of 65989747 is 74798956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65989747 - 2¹¹ = 65987699 is a prime.

It is not a weakly prime, because it can be changed into another prime (65989741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32994873 + 32994874.

It is an arithmetic number, because the mean of its divisors is an integer number (32994874).

Almost surely, 2^65989747 is an apocalyptic number.

65989747 is a deficient number, since it is larger than the sum of its proper divisors (1).

65989747 is an equidigital number, since it uses as much as digits as its factorization.

65989747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The square root of 65989747 is about 8123.4073515982. The cubic root of 65989747 is about 404.1030742947.

The spelling of 65989747 in words is "sixty-five million, nine hundred eighty-nine thousand, seven hundred forty-seven".