6981331 has 4 divisors (see below), whose sum is σ = 7978672. Its totient is φ = 5983992.

The previous prime is 6981329. The next prime is 6981349. The reversal of 6981331 is 1331896.

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

It is not a de Polignac number, because 6981331 - 2¹ = 6981329 is a prime.

It is a super-2 number, since 2×6981331² = 97477965063122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6981293 and 6981302.

It is not an unprimeable number, because it can be changed into a prime (6981301) 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, 498660 + ... + 498673.

It is an arithmetic number, because the mean of its divisors is an integer number (1994668).

Almost surely, 2^6981331 is an apocalyptic number.

6981331 is a deficient number, since it is larger than the sum of its proper divisors (997341).

6981331 is an equidigital number, since it uses as much as digits as its factorization.

6981331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997340.

The product of its digits is 3888, while the sum is 31.

The square root of 6981331 is about 2642.2208461822. The cubic root of 6981331 is about 191.1229072877.

The spelling of 6981331 in words is "six million, nine hundred eighty-one thousand, three hundred thirty-one".