6987761 has 4 divisors (see below), whose sum is σ = 7623024. Its totient is φ = 6352500.

The previous prime is 6987751. The next prime is 6987767. The reversal of 6987761 is 1677896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-6987761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6987767) 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, 317615 + ... + 317636.

It is an arithmetic number, because the mean of its divisors is an integer number (1905756).

Almost surely, 2^6987761 is an apocalyptic number.

It is an amenable number.

6987761 is a deficient number, since it is larger than the sum of its proper divisors (635263).

6987761 is a wasteful number, since it uses less digits than its factorization.

6987761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635262.

The product of its digits is 127008, while the sum is 44.

The square root of 6987761 is about 2643.4373455787. The cubic root of 6987761 is about 191.1815657869.

The spelling of 6987761 in words is "six million, nine hundred eighty-seven thousand, seven hundred sixty-one".