64687387 has 2 divisors, whose sum is σ = 64687388. Its totient is φ = 64687386.

The previous prime is 64687379. The next prime is 64687391. The reversal of 64687387 is 78378646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64687387 - 2³ = 64687379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64687387.

It is not a weakly prime, because it can be changed into another prime (64687687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343693 + 32343694.

It is an arithmetic number, because the mean of its divisors is an integer number (32343694).

Almost surely, 2^64687387 is an apocalyptic number.

64687387 is a deficient number, since it is larger than the sum of its proper divisors (1).

64687387 is an equidigital number, since it uses as much as digits as its factorization.

64687387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 49.

The square root of 64687387 is about 8042.8469462001. The cubic root of 64687387 is about 401.4269596620.

The spelling of 64687387 in words is "sixty-four million, six hundred eighty-seven thousand, three hundred eighty-seven".