64345847 has 2 divisors, whose sum is σ = 64345848. Its totient is φ = 64345846.

The previous prime is 64345819. The next prime is 64345859. The reversal of 64345847 is 74854346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64345847 - 2⁶ = 64345783 is a prime.

It is a super-3 number, since 3×64345847³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64345807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32172923 + 32172924.

It is an arithmetic number, because the mean of its divisors is an integer number (32172924).

Almost surely, 2^64345847 is an apocalyptic number.

64345847 is a deficient number, since it is larger than the sum of its proper divisors (1).

64345847 is an equidigital number, since it uses as much as digits as its factorization.

64345847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 41.

The square root of 64345847 is about 8021.5863144393. The cubic root of 64345847 is about 400.7192206125.

The spelling of 64345847 in words is "sixty-four million, three hundred forty-five thousand, eight hundred forty-seven".