6820123 has 4 divisors (see below), whose sum is σ = 6965280. Its totient is φ = 6674968.

The previous prime is 6820117. The next prime is 6820127. The reversal of 6820123 is 3210286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6820123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6820094 and 6820103.

It is not an unprimeable number, because it can be changed into a prime (6820127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72508 + ... + 72601.

It is an arithmetic number, because the mean of its divisors is an integer number (1741320).

Almost surely, 2^6820123 is an apocalyptic number.

6820123 is a deficient number, since it is larger than the sum of its proper divisors (145157).

6820123 is a wasteful number, since it uses less digits than its factorization.

6820123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145156.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 6820123 is about 2611.5365209011. The cubic root of 6820123 is about 189.6403445601.

The spelling of 6820123 in words is "six million, eight hundred twenty thousand, one hundred twenty-three".