64741309 has 2 divisors, whose sum is σ = 64741310. Its totient is φ = 64741308.

The previous prime is 64741307. The next prime is 64741331. The reversal of 64741309 is 90314746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56957209 + 7784100 = 7547^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 64741309 - 2¹ = 64741307 is a prime.

Together with 64741307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64741301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32370654 + 32370655.

It is an arithmetic number, because the mean of its divisors is an integer number (32370655).

Almost surely, 2^64741309 is an apocalyptic number.

It is an amenable number.

64741309 is a deficient number, since it is larger than the sum of its proper divisors (1).

64741309 is an equidigital number, since it uses as much as digits as its factorization.

64741309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 64741309 is about 8046.1984191294. The cubic root of 64741309 is about 401.5384689470.

The spelling of 64741309 in words is "sixty-four million, seven hundred forty-one thousand, three hundred nine".