6986891 has 2 divisors, whose sum is σ = 6986892. Its totient is φ = 6986890.

The previous prime is 6986887. The next prime is 6986909. The reversal of 6986891 is 1986896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6986891 - 2² = 6986887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6986801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493445 + 3493446.

It is an arithmetic number, because the mean of its divisors is an integer number (3493446).

Almost surely, 2^6986891 is an apocalyptic number.

6986891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6986891 is an equidigital number, since it uses as much as digits as its factorization.

6986891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 47.

The square root of 6986891 is about 2643.2727819883. The cubic root of 6986891 is about 191.1736312060.

The spelling of 6986891 in words is "six million, nine hundred eighty-six thousand, eight hundred ninety-one".