6420763 has 2 divisors, whose sum is σ = 6420764. Its totient is φ = 6420762.

The previous prime is 6420737. The next prime is 6420767. The reversal of 6420763 is 3670246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6420763 - 2⁵ = 6420731 is a prime.

It is not a weakly prime, because it can be changed into another prime (6420767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210381 + 3210382.

It is an arithmetic number, because the mean of its divisors is an integer number (3210382).

Almost surely, 2^6420763 is an apocalyptic number.

6420763 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420763 is an equidigital number, since it uses as much as digits as its factorization.

6420763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 6420763 is about 2533.9224534306. The cubic root of 6420763 is about 185.8641143397.

The spelling of 6420763 in words is "six million, four hundred twenty thousand, seven hundred sixty-three".