778579 has 2 divisors, whose sum is σ = 778580. Its totient is φ = 778578.

The previous prime is 778567. The next prime is 778597. The reversal of 778579 is 975877.

Together with next prime (778597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 778579 - 2¹³ = 770387 is a prime.

778579 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (778529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389289 + 389290.

It is an arithmetic number, because the mean of its divisors is an integer number (389290).

2⁷⁷⁸⁵⁷⁹ is an apocalyptic number.

778579 is a deficient number, since it is larger than the sum of its proper divisors (1).

778579 is an equidigital number, since it uses as much as digits as its factorization.

778579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 43.

The square root of 778579 is about 882.3712370652. The cubic root of 778579 is about 91.9957071091.

The spelling of 778579 in words is "seven hundred seventy-eight thousand, five hundred seventy-nine".