6981589 has 4 divisors (see below), whose sum is σ = 6997324. Its totient is φ = 6965856.

The previous prime is 6981563. The next prime is 6981593. The reversal of 6981589 is 9851896.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3179089 + 3802500 = 1783^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981589 - 2¹³ = 6973397 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 (6981539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7182 + ... + 8095.

It is an arithmetic number, because the mean of its divisors is an integer number (1749331).

Almost surely, 2^6981589 is an apocalyptic number.

It is an amenable number.

6981589 is a deficient number, since it is larger than the sum of its proper divisors (15735).

6981589 is a wasteful number, since it uses less digits than its factorization.

6981589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15734.

The product of its digits is 155520, while the sum is 46.

The square root of 6981589 is about 2642.2696682966. The cubic root of 6981589 is about 191.1252616192.

The spelling of 6981589 in words is "six million, nine hundred eighty-one thousand, five hundred eighty-nine".