64481387 has 2 divisors, whose sum is σ = 64481388. Its totient is φ = 64481386.

The previous prime is 64481377. The next prime is 64481407. The reversal of 64481387 is 78318446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64481387 - 2⁴ = 64481371 is a prime.

It is not a weakly prime, because it can be changed into another prime (64481327) 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, 32240693 + 32240694.

It is an arithmetic number, because the mean of its divisors is an integer number (32240694).

Almost surely, 2^64481387 is an apocalyptic number.

64481387 is a deficient number, since it is larger than the sum of its proper divisors (1).

64481387 is an equidigital number, since it uses as much as digits as its factorization.

64481387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 64481387 is about 8030.0303237285. The cubic root of 64481387 is about 401.0003855694. Note that the first 3 decimals are identical.

The spelling of 64481387 in words is "sixty-four million, four hundred eighty-one thousand, three hundred eighty-seven".