776969 has 2 divisors, whose sum is σ = 776970. Its totient is φ = 776968.

The previous prime is 776947. The next prime is 776977. The reversal of 776969 is 969677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 156025 = 788^2 + 395^2 .

It is an emirp because it is prime and its reverse (969677) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-776969 is a prime.

It is a super-2 number, since 2×776969² = 1207361653922, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 776969.

It is not a weakly prime, because it can be changed into another prime (776569) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388484 + 388485.

It is an arithmetic number, because the mean of its divisors is an integer number (388485).

2⁷⁷⁶⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

776969 is a deficient number, since it is larger than the sum of its proper divisors (1).

776969 is an equidigital number, since it uses as much as digits as its factorization.

776969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 776969 is about 881.4584505239. The cubic root of 776969 is about 91.9322516350.

The spelling of 776969 in words is "seven hundred seventy-six thousand, nine hundred sixty-nine".