6428777 has 2 divisors, whose sum is σ = 6428778. Its totient is φ = 6428776.

The previous prime is 6428767. The next prime is 6428789. The reversal of 6428777 is 7778246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3345241 + 3083536 = 1829^2 + 1756^2 .

It is a cyclic number.

It is not a de Polignac number, because 6428777 - 2⁴ = 6428761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6428767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214388 + 3214389.

It is an arithmetic number, because the mean of its divisors is an integer number (3214389).

Almost surely, 2^6428777 is an apocalyptic number.

It is an amenable number.

6428777 is a deficient number, since it is larger than the sum of its proper divisors (1).

6428777 is an equidigital number, since it uses as much as digits as its factorization.

6428777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 41.

The square root of 6428777 is about 2535.5033030939. The cubic root of 6428777 is about 185.9414102278.

The spelling of 6428777 in words is "six million, four hundred twenty-eight thousand, seven hundred seventy-seven".