421752874817 has 2 divisors, whose sum is σ = 421752874818. Its totient is φ = 421752874816.

The previous prime is 421752874759. The next prime is 421752874819. The reversal of 421752874817 is 718478257124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415581358336 + 6171516481 = 644656^2 + 78559^2 .

It is a cyclic number.

It is not a de Polignac number, because 421752874817 - 2¹⁴ = 421752858433 is a prime.

Together with 421752874819, 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 (421752874819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210876437408 + 210876437409.

It is an arithmetic number, because the mean of its divisors is an integer number (210876437409).

Almost surely, 2^421752874817 is an apocalyptic number.

It is an amenable number.

421752874817 is a deficient number, since it is larger than the sum of its proper divisors (1).

421752874817 is an equidigital number, since it uses as much as digits as its factorization.

421752874817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7024640, while the sum is 56.

The spelling of 421752874817 in words is "four hundred twenty-one billion, seven hundred fifty-two million, eight hundred seventy-four thousand, eight hundred seventeen".