6981909 has 8 divisors (see below), whose sum is σ = 10155552. Its totient is φ = 4231440.

The previous prime is 6981889. The next prime is 6981943. The reversal of 6981909 is 9091896.

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

It is not a de Polignac number, because 6981909 - 2¹² = 6977813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981959) 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, 105754 + ... + 105819.

It is an arithmetic number, because the mean of its divisors is an integer number (1269444).

Almost surely, 2^6981909 is an apocalyptic number.

It is an amenable number.

6981909 is a deficient number, since it is larger than the sum of its proper divisors (3173643).

6981909 is a wasteful number, since it uses less digits than its factorization.

6981909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211587.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 6981909 is about 2642.3302216037. The cubic root of 6981909 is about 191.1281816397.

The spelling of 6981909 in words is "six million, nine hundred eighty-one thousand, nine hundred nine".