6856369 has 12 divisors (see below), whose sum is σ = 7726516. Its totient is φ = 6047712.

The previous prime is 6856357. The next prime is 6856387. The reversal of 6856369 is 9636586.

It can be written as a sum of positive squares in 2 ways, for example, as 3470769 + 3385600 = 1863^2 + 1840^2 .

It is not a de Polignac number, because 6856369 - 2¹¹ = 6854321 is a prime.

It is a super-2 number, since 2×6856369² = 94019591728322, which contains 22 as substring.

It is a Duffinian number.

6856369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6856469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6379 + ... + 7375.

Almost surely, 2^6856369 is an apocalyptic number.

It is an amenable number.

6856369 is a deficient number, since it is larger than the sum of its proper divisors (870147).

6856369 is a wasteful number, since it uses less digits than its factorization.

6856369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1033 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 6856369 is about 2618.4669178739. The cubic root of 6856369 is about 189.9757032643.

It can be divided in two parts, 6856 and 369, that added together give a square (7225 = 85²).

The spelling of 6856369 in words is "six million, eight hundred fifty-six thousand, three hundred sixty-nine".