872789 has 2 divisors, whose sum is σ = 872790. Its totient is φ = 872788.

The previous prime is 872761. The next prime is 872791. The reversal of 872789 is 987278.

872789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 339889 = 730^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 872789 - 2⁸ = 872533 is a prime.

Together with 872791, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436394 + 436395.

It is an arithmetic number, because the mean of its divisors is an integer number (436395).

2⁸⁷²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

872789 is a deficient number, since it is larger than the sum of its proper divisors (1).

872789 is an equidigital number, since it uses as much as digits as its factorization.

872789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 872789 is about 934.2317699586. The cubic root of 872789 is about 95.5659294568.

It can be divided in two parts, 872 and 789, that added together give a palindrome (1661).

The spelling of 872789 in words is "eight hundred seventy-two thousand, seven hundred eighty-nine".