64793809 has 2 divisors, whose sum is σ = 64793810. Its totient is φ = 64793808.

The previous prime is 64793797. The next prime is 64793821. The reversal of 64793809 is 90839746.

It is a balanced prime because it is at equal distance from previous prime (64793797) and next prime (64793821).

It can be written as a sum of positive squares in only one way, i.e., 43890625 + 20903184 = 6625^2 + 4572^2 .

It is a cyclic number.

It is not a de Polignac number, because 64793809 - 2⁹ = 64793297 is a prime.

It is not a weakly prime, because it can be changed into another prime (64793879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32396904 + 32396905.

It is an arithmetic number, because the mean of its divisors is an integer number (32396905).

Almost surely, 2^64793809 is an apocalyptic number.

It is an amenable number.

64793809 is a deficient number, since it is larger than the sum of its proper divisors (1).

64793809 is an equidigital number, since it uses as much as digits as its factorization.

64793809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 64793809 is about 8049.4601682349. The cubic root of 64793809 is about 401.6469781006.

The spelling of 64793809 in words is "sixty-four million, seven hundred ninety-three thousand, eight hundred nine".