64387783 has 2 divisors, whose sum is σ = 64387784. Its totient is φ = 64387782.

The previous prime is 64387781. The next prime is 64387811. The reversal of 64387783 is 38778346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64387783 - 2¹ = 64387781 is a prime.

Together with 64387781, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64387781) 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, 32193891 + 32193892.

It is an arithmetic number, because the mean of its divisors is an integer number (32193892).

Almost surely, 2^64387783 is an apocalyptic number.

64387783 is a deficient number, since it is larger than the sum of its proper divisors (1).

64387783 is an equidigital number, since it uses as much as digits as its factorization.

64387783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 64387783 is about 8024.1998354976. The cubic root of 64387783 is about 400.8062550401.

The spelling of 64387783 in words is "sixty-four million, three hundred eighty-seven thousand, seven hundred eighty-three".