6975989 has 4 divisors (see below), whose sum is σ = 6981324. Its totient is φ = 6970656.

The previous prime is 6975971. The next prime is 6976033. The reversal of 6975989 is 9895796.

6975989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4695889 + 2280100 = 2167^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 6975989 - 2¹² = 6971893 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6975989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6975919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (1745331).

Almost surely, 2^6975989 is an apocalyptic number.

It is an amenable number.

6975989 is a deficient number, since it is larger than the sum of its proper divisors (5335).

6975989 is a wasteful number, since it uses less digits than its factorization.

6975989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334.

The product of its digits is 1224720, while the sum is 53.

The square root of 6975989 is about 2641.2097606968. The cubic root of 6975989 is about 191.0741468105.

The spelling of 6975989 in words is "six million, nine hundred seventy-five thousand, nine hundred eighty-nine".