6789977 has 2 divisors, whose sum is σ = 6789978. Its totient is φ = 6789976.

The previous prime is 6789967. The next prime is 6789983. The reversal of 6789977 is 7799876.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3444736 + 3345241 = 1856^2 + 1829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6789977 is a prime.

It is a super-2 number, since 2×6789977² = 92207575321058, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6789947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3394988 + 3394989.

It is an arithmetic number, because the mean of its divisors is an integer number (3394989).

Almost surely, 2^6789977 is an apocalyptic number.

It is an amenable number.

6789977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6789977 is an equidigital number, since it uses as much as digits as its factorization.

6789977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 53.

The square root of 6789977 is about 2605.7584308604. The cubic root of 6789977 is about 189.3605186311.

It can be divided in two parts, 67899 and 77, that added together give a palindrome (67976).

The spelling of 6789977 in words is "six million, seven hundred eighty-nine thousand, nine hundred seventy-seven".