789391 has 2 divisors, whose sum is σ = 789392. Its totient is φ = 789390.

The previous prime is 789389. The next prime is 789407. The reversal of 789391 is 193987.

789391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 789391 - 2¹ = 789389 is a prime.

Together with 789389, it forms a pair of twin primes.

789391 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 789391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (789311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394695 + 394696.

It is an arithmetic number, because the mean of its divisors is an integer number (394696).

2⁷⁸⁹³⁹¹ is an apocalyptic number.

789391 is a deficient number, since it is larger than the sum of its proper divisors (1).

789391 is an equidigital number, since it uses as much as digits as its factorization.

789391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 789391 is about 888.4767864159. The cubic root of 789391 is about 92.4195941155.

It can be divided in two parts, 7 and 89391, that added together give a palindrome (89398).

The spelling of 789391 in words is "seven hundred eighty-nine thousand, three hundred ninety-one".