6908391 has 24 divisors (see below), whose sum is σ = 11625120. Its totient is φ = 3871296.

The previous prime is 6908387. The next prime is 6908393. The reversal of 6908391 is 1938096.

It is not a de Polignac number, because 6908391 - 2² = 6908387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6908393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2305 + ... + 4373.

It is an arithmetic number, because the mean of its divisors is an integer number (484380).

Almost surely, 2^6908391 is an apocalyptic number.

6908391 is a deficient number, since it is larger than the sum of its proper divisors (4716729).

6908391 is a wasteful number, since it uses less digits than its factorization.

6908391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 6908391 is about 2628.3818215777. The cubic root of 6908391 is about 190.4549669319.

The spelling of 6908391 in words is "six million, nine hundred eight thousand, three hundred ninety-one".