6909878 has 8 divisors (see below), whose sum is σ = 10411968. Its totient is φ = 3439224.

The previous prime is 6909841. The next prime is 6909887. The reversal of 6909878 is 8789096.

6909878 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7301 + ... + 8192.

It is an arithmetic number, because the mean of its divisors is an integer number (1301496).

Almost surely, 2^6909878 is an apocalyptic number.

6909878 is a deficient number, since it is larger than the sum of its proper divisors (3502090).

6909878 is a wasteful number, since it uses less digits than its factorization.

6909878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15718.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 6909878 is about 2628.6646800229. The cubic root of 6909878 is about 190.4686308091.

The spelling of 6909878 in words is "six million, nine hundred nine thousand, eight hundred seventy-eight".