65447321 has 2 divisors, whose sum is σ = 65447322. Its totient is φ = 65447320.

The previous prime is 65447311. The next prime is 65447329. The reversal of 65447321 is 12374456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 18181696 = 6875^2 + 4264^2 .

It is a cyclic number.

It is not a de Polignac number, because 65447321 - 2⁶ = 65447257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65447329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32723660 + 32723661.

It is an arithmetic number, because the mean of its divisors is an integer number (32723661).

Almost surely, 2^65447321 is an apocalyptic number.

It is an amenable number.

65447321 is a deficient number, since it is larger than the sum of its proper divisors (1).

65447321 is an equidigital number, since it uses as much as digits as its factorization.

65447321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 65447321 is about 8089.9518539976. The cubic root of 65447321 is about 402.9928040470.

The spelling of 65447321 in words is "sixty-five million, four hundred forty-seven thousand, three hundred twenty-one".