6404771 has 2 divisors, whose sum is σ = 6404772. Its totient is φ = 6404770.

The previous prime is 6404753. The next prime is 6404773. The reversal of 6404771 is 1774046.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404771 is a prime.

Together with 6404773, 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 (6404773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202385 + 3202386.

It is an arithmetic number, because the mean of its divisors is an integer number (3202386).

Almost surely, 2^6404771 is an apocalyptic number.

6404771 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404771 is an equidigital number, since it uses as much as digits as its factorization.

6404771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 6404771 is about 2530.7649041347. The cubic root of 6404771 is about 185.7096773441.

The spelling of 6404771 in words is "six million, four hundred four thousand, seven hundred seventy-one".