778284841 has 2 divisors, whose sum is σ = 778284842. Its totient is φ = 778284840.

The previous prime is 778284839. The next prime is 778284847. The reversal of 778284841 is 148482877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 759829225 + 18455616 = 27565^2 + 4296^2 .

It is an emirp because it is prime and its reverse (148482877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 778284841 - 2¹ = 778284839 is a prime.

Together with 778284839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (778284847) 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, 389142420 + 389142421.

It is an arithmetic number, because the mean of its divisors is an integer number (389142421).

Almost surely, 2^778284841 is an apocalyptic number.

It is an amenable number.

778284841 is a deficient number, since it is larger than the sum of its proper divisors (1).

778284841 is an equidigital number, since it uses as much as digits as its factorization.

778284841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 802816, while the sum is 49.

The square root of 778284841 is about 27897.7569169996. The cubic root of 778284841 is about 919.8411985675.

The spelling of 778284841 in words is "seven hundred seventy-eight million, two hundred eighty-four thousand, eight hundred forty-one".