6987559 has 4 divisors (see below), whose sum is σ = 6993216. Its totient is φ = 6981904.

The previous prime is 6987557. The next prime is 6987583. The reversal of 6987559 is 9557896.

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 is a cyclic number.

It is not a de Polignac number, because 6987559 - 2¹ = 6987557 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 (6987551) 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, 94 + ... + 3739.

It is an arithmetic number, because the mean of its divisors is an integer number (1748304).

Almost surely, 2^6987559 is an apocalyptic number.

6987559 is a deficient number, since it is larger than the sum of its proper divisors (5657).

6987559 is a wasteful number, since it uses less digits than its factorization.

6987559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656.

The product of its digits is 680400, while the sum is 49.

The square root of 6987559 is about 2643.3991374743. The cubic root of 6987559 is about 191.1797235636.

The spelling of 6987559 in words is "six million, nine hundred eighty-seven thousand, five hundred fifty-nine".