123847 has 4 divisors (see below), whose sum is σ = 124576. Its totient is φ = 123120.

The previous prime is 123833. The next prime is 123853. The reversal of 123847 is 748321.

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: 748321 = 7 ⋅106903.

It is a cyclic number.

It is not a de Polignac number, because 123847 - 2⁷ = 123719 is a prime.

It is a Duffinian number.

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 (123817) 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, 43 + ... + 499.

It is an arithmetic number, because the mean of its divisors is an integer number (31144).

2¹²³⁸⁴⁷ is an apocalyptic number.

123847 is a deficient number, since it is larger than the sum of its proper divisors (729).

123847 is an equidigital number, since it uses as much as digits as its factorization.

123847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728.

The product of its digits is 1344, while the sum is 25.

The square root of 123847 is about 351.9190247770. The cubic root of 123847 is about 49.8457915507.

It can be divided in two parts, 12 and 3847, that multiplied together give a palindrome (46164).

The spelling of 123847 in words is "one hundred twenty-three thousand, eight hundred forty-seven".