64686287 has 2 divisors, whose sum is σ = 64686288. Its totient is φ = 64686286.

The previous prime is 64686277. The next prime is 64686311. The reversal of 64686287 is 78268646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64686287 - 2⁸ = 64686031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64686217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343143 + 32343144.

It is an arithmetic number, because the mean of its divisors is an integer number (32343144).

Almost surely, 2^64686287 is an apocalyptic number.

64686287 is a deficient number, since it is larger than the sum of its proper divisors (1).

64686287 is an equidigital number, since it uses as much as digits as its factorization.

64686287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 47.

The square root of 64686287 is about 8042.7785621637. The cubic root of 64686287 is about 401.4246842459.

The spelling of 64686287 in words is "sixty-four million, six hundred eighty-six thousand, two hundred eighty-seven".