6420001019 has 2 divisors, whose sum is σ = 6420001020. Its totient is φ = 6420001018.

The previous prime is 6420001001. The next prime is 6420001033. The reversal of 6420001019 is 9101000246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6420001019 - 2²⁰ = 6418952443 is a prime.

It is a super-2 number, since 2×6420001019² = 82432826167922076722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6420000985 and 6420001003.

It is not a weakly prime, because it can be changed into another prime (6420031019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210000509 + 3210000510.

It is an arithmetic number, because the mean of its divisors is an integer number (3210000510).

Almost surely, 2^6420001019 is an apocalyptic number.

6420001019 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420001019 is an equidigital number, since it uses as much as digits as its factorization.

6420001019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 6420001019 is about 80124.9088548624. The cubic root of 6420001019 is about 1858.5676160365.

The spelling of 6420001019 in words is "six billion, four hundred twenty million, one thousand, nineteen".