6888561 has 4 divisors (see below), whose sum is σ = 9184752. Its totient is φ = 4592372.

The previous prime is 6888559. The next prime is 6888571. The reversal of 6888561 is 1658886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6888561 - 2¹ = 6888559 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6888521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148091 + ... + 1148096.

It is an arithmetic number, because the mean of its divisors is an integer number (2296188).

Almost surely, 2^6888561 is an apocalyptic number.

It is an amenable number.

6888561 is a deficient number, since it is larger than the sum of its proper divisors (2296191).

6888561 is a wasteful number, since it uses less digits than its factorization.

6888561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296190.

The product of its digits is 92160, while the sum is 42.

The square root of 6888561 is about 2624.6068276982. The cubic root of 6888561 is about 190.2725635636.

The spelling of 6888561 in words is "six million, eight hundred eighty-eight thousand, five hundred sixty-one".