6908561 has 4 divisors (see below), whose sum is σ = 7536624. Its totient is φ = 6280500.

The previous prime is 6908557. The next prime is 6908569. The reversal of 6908561 is 1658096.

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 6908561 - 2² = 6908557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6908569) 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, 314015 + ... + 314036.

It is an arithmetic number, because the mean of its divisors is an integer number (1884156).

Almost surely, 2^6908561 is an apocalyptic number.

It is an amenable number.

6908561 is a deficient number, since it is larger than the sum of its proper divisors (628063).

6908561 is a wasteful number, since it uses less digits than its factorization.

6908561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628062.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 6908561 is about 2628.4141606680. The cubic root of 6908561 is about 190.4565291422.

The spelling of 6908561 in words is "six million, nine hundred eight thousand, five hundred sixty-one".