6881977 has 2 divisors, whose sum is σ = 6881978. Its totient is φ = 6881976.

The previous prime is 6881951. The next prime is 6881981. The reversal of 6881977 is 7791886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5271616 + 1610361 = 2296^2 + 1269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6881977 is a prime.

It is not a weakly prime, because it can be changed into another prime (6881947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440988 + 3440989.

It is an arithmetic number, because the mean of its divisors is an integer number (3440989).

Almost surely, 2^6881977 is an apocalyptic number.

It is an amenable number.

6881977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881977 is an equidigital number, since it uses as much as digits as its factorization.

6881977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 6881977 is about 2623.3522447434. The cubic root of 6881977 is about 190.2119241987.

Subtracting 6881977 from its reverse (7791886), we obtain a palindrome (909909).

The spelling of 6881977 in words is "six million, eight hundred eighty-one thousand, nine hundred seventy-seven".