6908891217 has 8 divisors (see below), whose sum is σ = 9341599680. Its totient is φ = 4541055120.

The previous prime is 6908891189. The next prime is 6908891219. The reversal of 6908891217 is 7121988096.

6908891217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6908891217 - 2¹⁶ = 6908825681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6908891217.

It is not an unprimeable number, because it can be changed into a prime (6908891219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16217842 + ... + 16218267.

It is an arithmetic number, because the mean of its divisors is an integer number (1167699960).

Almost surely, 2^6908891217 is an apocalyptic number.

It is an amenable number.

6908891217 is a deficient number, since it is larger than the sum of its proper divisors (2432708463).

6908891217 is a wasteful number, since it uses less digits than its factorization.

6908891217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32436183.

The product of its (nonzero) digits is 435456, while the sum is 51.

The square root of 6908891217 is about 83119.7402366008. The cubic root of 6908891217 is about 1904.5956358898.

The spelling of 6908891217 in words is "six billion, nine hundred eight million, eight hundred ninety-one thousand, two hundred seventeen".