64964309 has 2 divisors, whose sum is σ = 64964310. Its totient is φ = 64964308.

The previous prime is 64964303. The next prime is 64964353. The reversal of 64964309 is 90346946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42902500 + 22061809 = 6550^2 + 4697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64964309 is a prime.

It is a super-2 number, since 2×64964309² = 8440722887694962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64964303) 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, 32482154 + 32482155.

It is an arithmetic number, because the mean of its divisors is an integer number (32482155).

Almost surely, 2^64964309 is an apocalyptic number.

It is an amenable number.

64964309 is a deficient number, since it is larger than the sum of its proper divisors (1).

64964309 is an equidigital number, since it uses as much as digits as its factorization.

64964309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 64964309 is about 8060.0439825103. The cubic root of 64964309 is about 401.9989707324.

The spelling of 64964309 in words is "sixty-four million, nine hundred sixty-four thousand, three hundred nine".