64671287 has 2 divisors, whose sum is σ = 64671288. Its totient is φ = 64671286.

The previous prime is 64671259. The next prime is 64671317. The reversal of 64671287 is 78217646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64671287 - 2¹⁴ = 64654903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64671787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32335643 + 32335644.

It is an arithmetic number, because the mean of its divisors is an integer number (32335644).

Almost surely, 2^64671287 is an apocalyptic number.

64671287 is a deficient number, since it is larger than the sum of its proper divisors (1).

64671287 is an equidigital number, since it uses as much as digits as its factorization.

64671287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 64671287 is about 8041.8459945463. The cubic root of 64671287 is about 401.3936532705.

The spelling of 64671287 in words is "sixty-four million, six hundred seventy-one thousand, two hundred eighty-seven".