65713649 has 2 divisors, whose sum is σ = 65713650. Its totient is φ = 65713648.

The previous prime is 65713631. The next prime is 65713727. The reversal of 65713649 is 94631756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57274624 + 8439025 = 7568^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 65713649 - 2¹⁶ = 65648113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65710649) 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, 32856824 + 32856825.

It is an arithmetic number, because the mean of its divisors is an integer number (32856825).

Almost surely, 2^65713649 is an apocalyptic number.

It is an amenable number.

65713649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65713649 is an equidigital number, since it uses as much as digits as its factorization.

65713649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 65713649 is about 8106.3955615304. The cubic root of 65713649 is about 403.5387037045.

The spelling of 65713649 in words is "sixty-five million, seven hundred thirteen thousand, six hundred forty-nine".