123679 has 4 divisors (see below), whose sum is σ = 124384.
Its totient is φ = 122976.
The previous prime is 123677. The next prime is 123701. The reversal of 123679 is 976321.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 976321 = 71 ⋅13751.
It is a cyclic number.
It is not a de Polignac number, because 123679 - 21 = 123677 is a prime.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a zygodrome in base 2.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (123677) 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 in 3 ways as a sum of consecutive naturals, for example, 154 + ... + 520.
It is an arithmetic number, because the mean of its divisors is an integer number (31096).
2123679 is an apocalyptic number.
123679 is a deficient number, since it is larger than the sum of its proper divisors (705).
123679 is an equidigital number, since it uses as much as digits as its factorization.
123679 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 704.
The product of its digits is 2268, while the sum is 28.
The square root of 123679 is about 351.6802525022.
The cubic root of 123679 is about 49.8232425390.
The spelling of 123679 in words is "one hundred twenty-three thousand, six hundred seventy-nine".