64646147 has 2 divisors, whose sum is σ = 64646148. Its totient is φ = 64646146.

The previous prime is 64646137. The next prime is 64646159. The reversal of 64646147 is 74164646.

64646147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64646147 - 2²⁰ = 63597571 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64646147.

It is not a weakly prime, because it can be changed into another prime (64646117) 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, 32323073 + 32323074.

It is an arithmetic number, because the mean of its divisors is an integer number (32323074).

Almost surely, 2^64646147 is an apocalyptic number.

64646147 is a deficient number, since it is larger than the sum of its proper divisors (1).

64646147 is an equidigital number, since it uses as much as digits as its factorization.

64646147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 64646147 is about 8040.2827686593. The cubic root of 64646147 is about 401.3416345938.

The spelling of 64646147 in words is "sixty-four million, six hundred forty-six thousand, one hundred forty-seven".