6780769 has 2 divisors, whose sum is σ = 6780770. Its totient is φ = 6780768.

The previous prime is 6780757. The next prime is 6780817. The reversal of 6780769 is 9670876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3763600 + 3017169 = 1940^2 + 1737^2 .

It is a cyclic number.

It is not a de Polignac number, because 6780769 - 2²¹ = 4683617 is a prime.

It is a super-2 number, since 2×6780769² = 91957656462722, which contains 22 as substring.

6780769 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6783769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390384 + 3390385.

It is an arithmetic number, because the mean of its divisors is an integer number (3390385).

Almost surely, 2^6780769 is an apocalyptic number.

It is an amenable number.

6780769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780769 is an equidigital number, since it uses as much as digits as its factorization.

6780769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 6780769 is about 2603.9909754068. The cubic root of 6780769 is about 189.2748815988.

It can be divided in two parts, 67807 and 69, that added together give a palindrome (67876).

The spelling of 6780769 in words is "six million, seven hundred eighty thousand, seven hundred sixty-nine".