6780023 has 4 divisors (see below), whose sum is σ = 6799800. Its totient is φ = 6760248.

The previous prime is 6780019. The next prime is 6780031. The reversal of 6780023 is 3200876.

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

It is a cyclic number.

It is not a de Polignac number, because 6780023 - 2² = 6780019 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6779974 and 6780001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780013) 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, 9365 + ... + 10062.

It is an arithmetic number, because the mean of its divisors is an integer number (1699950).

Almost surely, 2^6780023 is an apocalyptic number.

6780023 is a deficient number, since it is larger than the sum of its proper divisors (19777).

6780023 is a wasteful number, since it uses less digits than its factorization.

6780023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19776.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 6780023 is about 2603.8477298030. The cubic root of 6780023 is about 189.2679401914.

Adding to 6780023 its reverse (3200876), we get a palindrome (9980899).

The spelling of 6780023 in words is "six million, seven hundred eighty thousand, twenty-three".