6981413 has 4 divisors (see below), whose sum is σ = 6988428. Its totient is φ = 6974400.

The previous prime is 6981409. The next prime is 6981421. The reversal of 6981413 is 3141896.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1682209 + 5299204 = 1297^2 + 2302^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981413 - 2² = 6981409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6981413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706 + ... + 4107.

It is an arithmetic number, because the mean of its divisors is an integer number (1747107).

Almost surely, 2^6981413 is an apocalyptic number.

It is an amenable number.

6981413 is a deficient number, since it is larger than the sum of its proper divisors (7015).

6981413 is a wasteful number, since it uses less digits than its factorization.

6981413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014.

The product of its digits is 5184, while the sum is 32.

The square root of 6981413 is about 2642.2363633861. The cubic root of 6981413 is about 191.1236555699.

The spelling of 6981413 in words is "six million, nine hundred eighty-one thousand, four hundred thirteen".