6878569 has 2 divisors, whose sum is σ = 6878570. Its totient is φ = 6878568.

The previous prime is 6878567. The next prime is 6878579. The reversal of 6878569 is 9658786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4460544 + 2418025 = 2112^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 6878569 - 2¹ = 6878567 is a prime.

It is a super-2 number, since 2×6878569² = 94629422975522, which contains 22 as substring.

Together with 6878567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6878567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439284 + 3439285.

It is an arithmetic number, because the mean of its divisors is an integer number (3439285).

Almost surely, 2^6878569 is an apocalyptic number.

It is an amenable number.

6878569 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878569 is an equidigital number, since it uses as much as digits as its factorization.

6878569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 6878569 is about 2622.7026137174. The cubic root of 6878569 is about 190.1805209516.

It can be divided in two parts, 6878 and 569, that added together give a palindrome (7447).

The spelling of 6878569 in words is "six million, eight hundred seventy-eight thousand, five hundred sixty-nine".