6909904 has 10 divisors (see below), whose sum is σ = 13387970. Its totient is φ = 3454944.

The previous prime is 6909899. The next prime is 6909907. The reversal of 6909904 is 4099096.

6909904 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 559504 = 2520^2 + 748^2 .

It is a pancake number, because a pancake can be divided into 6909904 parts by 3717 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6909907) 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, 215919 + ... + 215950.

It is an arithmetic number, because the mean of its divisors is an integer number (1338797).

Almost surely, 2^6909904 is an apocalyptic number.

It is an amenable number.

6909904 is a deficient number, since it is larger than the sum of its proper divisors (6478066).

6909904 is a wasteful number, since it uses less digits than its factorization.

6909904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431877 (or 431871 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 6909904 is about 2628.6696254950. The cubic root of 6909904 is about 190.4688697028.

The spelling of 6909904 in words is "six million, nine hundred nine thousand, nine hundred four".