6887977 has 8 divisors (see below), whose sum is σ = 7018920. Its totient is φ = 6758400.

The previous prime is 6887953. The next prime is 6888019. The reversal of 6887977 is 7797886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1218816 + 5669161 = 1104^2 + 2381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6887977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6887917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16977 + ... + 17377.

It is an arithmetic number, because the mean of its divisors is an integer number (877365).

Almost surely, 2^6887977 is an apocalyptic number.

It is an amenable number.

6887977 is a deficient number, since it is larger than the sum of its proper divisors (130943).

6887977 is a wasteful number, since it uses less digits than its factorization.

6887977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683.

The product of its digits is 1185408, while the sum is 52.

The square root of 6887977 is about 2624.4955705811. The cubic root of 6887977 is about 190.2671864214.

Subtracting 6887977 from its reverse (7797886), we obtain a palindrome (909909).

The spelling of 6887977 in words is "six million, eight hundred eighty-seven thousand, nine hundred seventy-seven".