64780003 has 2 divisors, whose sum is σ = 64780004. Its totient is φ = 64780002.

The previous prime is 64779991. The next prime is 64780019. The reversal of 64780003 is 30008746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64780003 - 2⁵ = 64779971 is a prime.

It is not a weakly prime, because it can be changed into another prime (64780073) 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, 32390001 + 32390002.

It is an arithmetic number, because the mean of its divisors is an integer number (32390002).

Almost surely, 2^64780003 is an apocalyptic number.

64780003 is a deficient number, since it is larger than the sum of its proper divisors (1).

64780003 is an equidigital number, since it uses as much as digits as its factorization.

64780003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 64780003 is about 8048.6025495113. The cubic root of 64780003 is about 401.6184489754.

Adding to 64780003 its reverse (30008746), we get a palindrome (94788749).

The spelling of 64780003 in words is "sixty-four million, seven hundred eighty thousand, three".