64387663 has 2 divisors, whose sum is σ = 64387664. Its totient is φ = 64387662.

The previous prime is 64387657. The next prime is 64387709. The reversal of 64387663 is 36678346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64387663 - 2⁹ = 64387151 is a prime.

It is a super-2 number, since 2×64387663² = 8291542293203138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64327663) 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, 32193831 + 32193832.

It is an arithmetic number, because the mean of its divisors is an integer number (32193832).

Almost surely, 2^64387663 is an apocalyptic number.

64387663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64387663 is an equidigital number, since it uses as much as digits as its factorization.

64387663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 43.

The square root of 64387663 is about 8024.1923581131. The cubic root of 64387663 is about 400.8060060448.

The spelling of 64387663 in words is "sixty-four million, three hundred eighty-seven thousand, six hundred sixty-three".