64000649 has 2 divisors, whose sum is σ = 64000650. Its totient is φ = 64000648.

The previous prime is 64000637. The next prime is 64000661. The reversal of 64000649 is 94600046.

It is a balanced prime because it is at equal distance from previous prime (64000637) and next prime (64000661).

It can be written as a sum of positive squares in only one way, i.e., 50310649 + 13690000 = 7093^2 + 3700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64000649 is a prime.

It is not a weakly prime, because it can be changed into another prime (64000669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32000324 + 32000325.

It is an arithmetic number, because the mean of its divisors is an integer number (32000325).

Almost surely, 2^64000649 is an apocalyptic number.

It is an amenable number.

64000649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64000649 is an equidigital number, since it uses as much as digits as its factorization.

64000649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 64000649 is about 8000.0405623972. The cubic root of 64000649 is about 400.0013520788.

The spelling of 64000649 in words is "sixty-four million, six hundred forty-nine", and thus it is an aban number.