64308247 has 2 divisors, whose sum is σ = 64308248. Its totient is φ = 64308246.

The previous prime is 64308241. The next prime is 64308281. The reversal of 64308247 is 74280346.

64308247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (64308281) can be obtained adding 64308247 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64308247 - 2¹⁵ = 64275479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64308241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32154123 + 32154124.

It is an arithmetic number, because the mean of its divisors is an integer number (32154124).

Almost surely, 2^64308247 is an apocalyptic number.

64308247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64308247 is an equidigital number, since it uses as much as digits as its factorization.

64308247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 64308247 is about 8019.2422958781. The cubic root of 64308247 is about 400.6411530080.

The spelling of 64308247 in words is "sixty-four million, three hundred eight thousand, two hundred forty-seven".