776887 has 2 divisors, whose sum is σ = 776888. Its totient is φ = 776886.

The previous prime is 776879. The next prime is 776899. The reversal of 776887 is 788677.

It is a weak prime.

It is an emirp because it is prime and its reverse (788677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776887 - 2³ = 776879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (776837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388443 + 388444.

It is an arithmetic number, because the mean of its divisors is an integer number (388444).

776887 is a Friedman number, since it can be written as 7^7-6^(7-8/8), using all its digits and the basic arithmetic operations.

2⁷⁷⁶⁸⁸⁷ is an apocalyptic number.

776887 is a deficient number, since it is larger than the sum of its proper divisors (1).

776887 is an equidigital number, since it uses as much as digits as its factorization.

776887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 43.

The square root of 776887 is about 881.4119354763. The cubic root of 776887 is about 91.9290173962.

The spelling of 776887 in words is "seven hundred seventy-six thousand, eight hundred eighty-seven".