64304809 has 2 divisors, whose sum is σ = 64304810. Its totient is φ = 64304808.

The previous prime is 64304783. The next prime is 64304813. The reversal of 64304809 is 90840346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 10061584 = 7365^2 + 3172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64304809 is a prime.

It is not a weakly prime, because it can be changed into another prime (64304899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32152404 + 32152405.

It is an arithmetic number, because the mean of its divisors is an integer number (32152405).

Almost surely, 2^64304809 is an apocalyptic number.

It is an amenable number.

64304809 is a deficient number, since it is larger than the sum of its proper divisors (1).

64304809 is an equidigital number, since it uses as much as digits as its factorization.

64304809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 64304809 is about 8019.0279336089. The cubic root of 64304809 is about 400.6340132869.

The spelling of 64304809 in words is "sixty-four million, three hundred four thousand, eight hundred nine".