421433243019947 has 2 divisors, whose sum is σ = 421433243019948. Its totient is φ = 421433243019946.

The previous prime is 421433243019937. The next prime is 421433243020039. The reversal of 421433243019947 is 749910342334124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421433243019947 - 2⁴⁶ = 351064498842283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421433243019892 and 421433243019901.

It is not a weakly prime, because it can be changed into another prime (421433243019907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210716621509973 + 210716621509974.

It is an arithmetic number, because the mean of its divisors is an integer number (210716621509974).

Almost surely, 2^{421433243019947} is an apocalyptic number.

421433243019947 is a deficient number, since it is larger than the sum of its proper divisors (1).

421433243019947 is an equidigital number, since it uses as much as digits as its factorization.

421433243019947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 421433243019947 in words is "four hundred twenty-one trillion, four hundred thirty-three billion, two hundred forty-three million, nineteen thousand, nine hundred forty-seven".