6404777 has 2 divisors, whose sum is σ = 6404778. Its totient is φ = 6404776.

The previous prime is 6404773. The next prime is 6404779. The reversal of 6404777 is 7774046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5331481 + 1073296 = 2309^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404777 - 2² = 6404773 is a prime.

Together with 6404779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6404771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202388 + 3202389.

It is an arithmetic number, because the mean of its divisors is an integer number (3202389).

Almost surely, 2^6404777 is an apocalyptic number.

It is an amenable number.

6404777 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404777 is an equidigital number, since it uses as much as digits as its factorization.

6404777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 6404777 is about 2530.7660895468. The cubic root of 6404777 is about 185.7097353351.

The spelling of 6404777 in words is "six million, four hundred four thousand, seven hundred seventy-seven".