6869021 has 2 divisors, whose sum is σ = 6869022. Its totient is φ = 6869020.

The previous prime is 6868999. The next prime is 6869029. The reversal of 6869021 is 1209686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 422500 = 2539^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 6869021 - 2¹⁰ = 6867997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6869029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434510 + 3434511.

It is an arithmetic number, because the mean of its divisors is an integer number (3434511).

Almost surely, 2^6869021 is an apocalyptic number.

It is an amenable number.

6869021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6869021 is an equidigital number, since it uses as much as digits as its factorization.

6869021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 6869021 is about 2620.8817218638. The cubic root of 6869021 is about 190.0924849837.

The spelling of 6869021 in words is "six million, eight hundred sixty-nine thousand, twenty-one".