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BaseRepresentation
bin1101011010101
3100102102
41223111
5204434
651445
726012
oct15325
910372
106869
115185
123b85
133185
142709
15207e

6869 has 2 divisors, whose sum is σ = 6870. Its totient is φ = 6868.

The previous prime is 6863. The next prime is 6871. The reversal of 6869 is 9686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3844 + 3025 = 62^2 + 55^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-6869 is a prime.

It is a super-2 number, since 2×68692 = 94366322, which contains 22 as substring.

Together with 6871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434 + 3435.

It is an arithmetic number, because the mean of its divisors is an integer number (3435).

26869 is an apocalyptic number.

It is an amenable number.

6869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6869 is an equidigital number, since it uses as much as digits as its factorization.

6869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 6869 is about 82.8794305000. The cubic root of 6869 is about 19.0092291266.

The spelling of 6869 in words is "six thousand, eight hundred sixty-nine".