420933897647 has 2 divisors, whose sum is σ = 420933897648. Its totient is φ = 420933897646.

The previous prime is 420933897611. The next prime is 420933897649. The reversal of 420933897647 is 746798339024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420933897647 - 2¹⁰ = 420933896623 is a prime.

Together with 420933897649, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420933897647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420933897649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210466948823 + 210466948824.

It is an arithmetic number, because the mean of its divisors is an integer number (210466948824).

Almost surely, 2^420933897647 is an apocalyptic number.

420933897647 is a deficient number, since it is larger than the sum of its proper divisors (1).

420933897647 is an equidigital number, since it uses as much as digits as its factorization.

420933897647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 420933897647 in words is "four hundred twenty billion, nine hundred thirty-three million, eight hundred ninety-seven thousand, six hundred forty-seven".