6981977 has 2 divisors, whose sum is σ = 6981978. Its totient is φ = 6981976.

The previous prime is 6981973. The next prime is 6981983. The reversal of 6981977 is 7791896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4734976 + 2247001 = 2176^2 + 1499^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981977 - 2² = 6981973 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6981973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490988 + 3490989.

It is an arithmetic number, because the mean of its divisors is an integer number (3490989).

Almost surely, 2^6981977 is an apocalyptic number.

It is an amenable number.

6981977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981977 is an equidigital number, since it uses as much as digits as its factorization.

6981977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 47.

The square root of 6981977 is about 2642.3430890026. The cubic root of 6981977 is about 191.1288021326.

It can be divided in two parts, 69819 and 77, that added together give a palindrome (69896).

The spelling of 6981977 in words is "six million, nine hundred eighty-one thousand, nine hundred seventy-seven".