789979 has 2 divisors, whose sum is σ = 789980. Its totient is φ = 789978.

The previous prime is 789977. The next prime is 790003. The reversal of 789979 is 979987.

It is a weak prime.

It is an emirp because it is prime and its reverse (979987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 789979 - 2¹ = 789977 is a prime.

Together with 789977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (789977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394989 + 394990.

It is an arithmetic number, because the mean of its divisors is an integer number (394990).

2⁷⁸⁹⁹⁷⁹ is an apocalyptic number.

789979 is a deficient number, since it is larger than the sum of its proper divisors (1).

789979 is an equidigital number, since it uses as much as digits as its factorization.

789979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 49.

The square root of 789979 is about 888.8076282301. The cubic root of 789979 is about 92.4425355282.

The spelling of 789979 in words is "seven hundred eighty-nine thousand, nine hundred seventy-nine".