64851487 has 2 divisors, whose sum is σ = 64851488. Its totient is φ = 64851486.

The previous prime is 64851461. The next prime is 64851497. The reversal of 64851487 is 78415846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64851487 is a prime.

It is a super-2 number, since 2×64851487² = 8411430732222338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64851497) 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, 32425743 + 32425744.

It is an arithmetic number, because the mean of its divisors is an integer number (32425744).

Almost surely, 2^64851487 is an apocalyptic number.

64851487 is a deficient number, since it is larger than the sum of its proper divisors (1).

64851487 is an equidigital number, since it uses as much as digits as its factorization.

64851487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 43.

The square root of 64851487 is about 8053.0420960032. The cubic root of 64851487 is about 401.7661218076.

The spelling of 64851487 in words is "sixty-four million, eight hundred fifty-one thousand, four hundred eighty-seven".