779797 has 2 divisors, whose sum is σ = 779798. Its totient is φ = 779796.

The previous prime is 779791. The next prime is 779827. The reversal of 779797 is 797977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 125316 = 809^2 + 354^2 .

It is an emirp because it is prime and its reverse (797977) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-779797 is a prime.

It is a super-2 number, since 2×779797² = 1216166722418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (779791) 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, 389898 + 389899.

It is an arithmetic number, because the mean of its divisors is an integer number (389899).

2⁷⁷⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

779797 is a deficient number, since it is larger than the sum of its proper divisors (1).

779797 is an equidigital number, since it uses as much as digits as its factorization.

779797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194481, while the sum is 46.

The square root of 779797 is about 883.0611530353. The cubic root of 779797 is about 92.0436544558.

The spelling of 779797 in words is "seven hundred seventy-nine thousand, seven hundred ninety-seven".