6981731 has 2 divisors, whose sum is σ = 6981732. Its totient is φ = 6981730.

The previous prime is 6981703. The next prime is 6981739. The reversal of 6981731 is 1371896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6981731 - 2¹⁴ = 6965347 is a prime.

It is a super-2 number, since 2×6981731² = 97489135512722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6981691 and 6981700.

It is not a weakly prime, because it can be changed into another prime (6981739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490865 + 3490866.

It is an arithmetic number, because the mean of its divisors is an integer number (3490866).

Almost surely, 2^6981731 is an apocalyptic number.

6981731 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981731 is an equidigital number, since it uses as much as digits as its factorization.

6981731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 6981731 is about 2642.2965389978. The cubic root of 6981731 is about 191.1265573893.

The spelling of 6981731 in words is "six million, nine hundred eighty-one thousand, seven hundred thirty-one".