6908641 has 4 divisors (see below), whose sum is σ = 7146900. Its totient is φ = 6670384.

The previous prime is 6908633. The next prime is 6908651. The reversal of 6908641 is 1468096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1600225 + 5308416 = 1265^2 + 2304^2 .

It is a cyclic number.

It is not a de Polignac number, because 6908641 - 2³ = 6908633 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6908597 and 6908606.

It is not an unprimeable number, because it can be changed into a prime (6908611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119086 + ... + 119143.

It is an arithmetic number, because the mean of its divisors is an integer number (1786725).

Almost surely, 2^6908641 is an apocalyptic number.

It is an amenable number.

6908641 is a deficient number, since it is larger than the sum of its proper divisors (238259).

6908641 is a wasteful number, since it uses less digits than its factorization.

6908641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238258.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6908641 is about 2628.4293789257. The cubic root of 6908641 is about 190.4572642911.

The spelling of 6908641 in words is "six million, nine hundred eight thousand, six hundred forty-one".