778461713 has 2 divisors, whose sum is σ = 778461714. Its totient is φ = 778461712.

The previous prime is 778461661. The next prime is 778461737. The reversal of 778461713 is 317164877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477335104 + 301126609 = 21848^2 + 17353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-778461713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (778461113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389230856 + 389230857.

It is an arithmetic number, because the mean of its divisors is an integer number (389230857).

Almost surely, 2^778461713 is an apocalyptic number.

It is an amenable number.

778461713 is a deficient number, since it is larger than the sum of its proper divisors (1).

778461713 is an equidigital number, since it uses as much as digits as its factorization.

778461713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 44.

The square root of 778461713 is about 27900.9267408808. The cubic root of 778461713 is about 919.9108739275.

The spelling of 778461713 in words is "seven hundred seventy-eight million, four hundred sixty-one thousand, seven hundred thirteen".