6990677 has 2 divisors, whose sum is σ = 6990678. Its totient is φ = 6990676.

The previous prime is 6990673. The next prime is 6990679. The reversal of 6990677 is 7760996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4553956 + 2436721 = 2134^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 6990677 - 2² = 6990673 is a prime.

Together with 6990679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6990673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495338 + 3495339.

It is an arithmetic number, because the mean of its divisors is an integer number (3495339).

Almost surely, 2^6990677 is an apocalyptic number.

It is an amenable number.

6990677 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990677 is an equidigital number, since it uses as much as digits as its factorization.

6990677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 6990677 is about 2643.9888426391. The cubic root of 6990677 is about 191.2081555113.

It can be divided in two parts, 6990 and 677, that added together give a palindrome (7667).

The spelling of 6990677 in words is "six million, nine hundred ninety thousand, six hundred seventy-seven".