788789 has 2 divisors, whose sum is σ = 788790. Its totient is φ = 788788.

The previous prime is 788779. The next prime is 788813. The reversal of 788789 is 987887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448900 + 339889 = 670^2 + 583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-788789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394394 + 394395.

It is an arithmetic number, because the mean of its divisors is an integer number (394395).

2⁷⁸⁸⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

788789 is a deficient number, since it is larger than the sum of its proper divisors (1).

788789 is an equidigital number, since it uses as much as digits as its factorization.

788789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 47.

The square root of 788789 is about 888.1379397368. The cubic root of 788789 is about 92.3960946732.

It can be divided in two parts, 78878 and 9, that added together give a palindrome (78887).

The spelling of 788789 in words is "seven hundred eighty-eight thousand, seven hundred eighty-nine".