789123 has 8 divisors (see below), whose sum is σ = 1114128. Its totient is φ = 495104.

The previous prime is 789121. The next prime is 789133. The reversal of 789123 is 321987.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 789123 - 2¹ = 789121 is a prime.

789123 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (789121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7686 + ... + 7787.

It is an arithmetic number, because the mean of its divisors is an integer number (139266).

2⁷⁸⁹¹²³ is an apocalyptic number.

789123 is a deficient number, since it is larger than the sum of its proper divisors (325005).

789123 is a wasteful number, since it uses less digits than its factorization.

789123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15493.

The product of its digits is 3024, while the sum is 30.

The square root of 789123 is about 888.3259536904. The cubic root of 789123 is about 92.4091340458.

The spelling of 789123 in words is "seven hundred eighty-nine thousand, one hundred twenty-three".