780887 has 2 divisors, whose sum is σ = 780888. Its totient is φ = 780886.

The previous prime is 780877. The next prime is 780889. The reversal of 780887 is 788087.

It is a strong prime.

It is an emirp because it is prime and its reverse (788087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780887 - 2⁶ = 780823 is a prime.

Together with 780889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 780887.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 780887.

It is not a weakly prime, because it can be changed into another prime (780889) 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, 390443 + 390444.

It is an arithmetic number, because the mean of its divisors is an integer number (390444).

2⁷⁸⁰⁸⁸⁷ is an apocalyptic number.

780887 is a deficient number, since it is larger than the sum of its proper divisors (1).

780887 is an equidigital number, since it uses as much as digits as its factorization.

780887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 780887 is about 883.6781088156. The cubic root of 780887 is about 92.0865206862.

The spelling of 780887 in words is "seven hundred eighty thousand, eight hundred eighty-seven".