776887897 has 2 divisors, whose sum is σ = 776887898. Its totient is φ = 776887896.

The previous prime is 776887883. The next prime is 776887901. The reversal of 776887897 is 798788677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579316761 + 197571136 = 24069^2 + 14056^2 .

It is an emirp because it is prime and its reverse (798788677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776887897 - 2¹¹ = 776885849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (776887877) 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, 388443948 + 388443949.

It is an arithmetic number, because the mean of its divisors is an integer number (388443949).

Almost surely, 2^776887897 is an apocalyptic number.

It is an amenable number.

776887897 is a deficient number, since it is larger than the sum of its proper divisors (1).

776887897 is an equidigital number, since it uses as much as digits as its factorization.

776887897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66382848, while the sum is 67.

The square root of 776887897 is about 27872.7088206367. The cubic root of 776887897 is about 919.2905277681.

The spelling of 776887897 in words is "seven hundred seventy-six million, eight hundred eighty-seven thousand, eight hundred ninety-seven".