65969549 has 2 divisors, whose sum is σ = 65969550. Its totient is φ = 65969548.

The previous prime is 65969521. The next prime is 65969551. The reversal of 65969549 is 94596956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60762025 + 5207524 = 7795^2 + 2282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65969549 is a prime.

Together with 65969551, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65969549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65969569) 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, 32984774 + 32984775.

It is an arithmetic number, because the mean of its divisors is an integer number (32984775).

Almost surely, 2^65969549 is an apocalyptic number.

It is an amenable number.

65969549 is a deficient number, since it is larger than the sum of its proper divisors (1).

65969549 is an equidigital number, since it uses as much as digits as its factorization.

65969549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2624400, while the sum is 53.

The square root of 65969549 is about 8122.1640589193. The cubic root of 65969549 is about 404.0618410872.

The spelling of 65969549 in words is "sixty-five million, nine hundred sixty-nine thousand, five hundred forty-nine".