6981709 has 8 divisors (see below), whose sum is σ = 8149248. Its totient is φ = 5856720.

The previous prime is 6981703. The next prime is 6981731. The reversal of 6981709 is 9071896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6981709 - 2¹³ = 6973517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10282 + ... + 10939.

It is an arithmetic number, because the mean of its divisors is an integer number (1018656).

Almost surely, 2^6981709 is an apocalyptic number.

It is an amenable number.

6981709 is a deficient number, since it is larger than the sum of its proper divisors (1167539).

6981709 is a wasteful number, since it uses less digits than its factorization.

6981709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21275.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 6981709 is about 2642.2923759493. The cubic root of 6981709 is about 191.1263566374.

The spelling of 6981709 in words is "six million, nine hundred eighty-one thousand, seven hundred nine".