6985831 has 2 divisors, whose sum is σ = 6985832. Its totient is φ = 6985830.

The previous prime is 6985829. The next prime is 6985841. The reversal of 6985831 is 1385896.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6985831 - 2¹ = 6985829 is a prime.

It is a super-2 number, since 2×6985831² = 97603669521122, which contains 22 as substring.

Together with 6985829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6985841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492915 + 3492916.

It is an arithmetic number, because the mean of its divisors is an integer number (3492916).

Almost surely, 2^6985831 is an apocalyptic number.

6985831 is a deficient number, since it is larger than the sum of its proper divisors (1).

6985831 is an equidigital number, since it uses as much as digits as its factorization.

6985831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 6985831 is about 2643.0722653760. The cubic root of 6985831 is about 191.1639628954.

The spelling of 6985831 in words is "six million, nine hundred eighty-five thousand, eight hundred thirty-one".