428247641819 has 2 divisors, whose sum is σ = 428247641820. Its totient is φ = 428247641818.

The previous prime is 428247641779. The next prime is 428247641821. The reversal of 428247641819 is 918146742824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428247641819 is a prime.

It is a super-2 number, since 2×428247641819² (a number of 24 digits) contains 22 as substring.

Together with 428247641821, 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 (428247641839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214123820909 + 214123820910.

It is an arithmetic number, because the mean of its divisors is an integer number (214123820910).

Almost surely, 2^428247641819 is an apocalyptic number.

428247641819 is a deficient number, since it is larger than the sum of its proper divisors (1).

428247641819 is an equidigital number, since it uses as much as digits as its factorization.

428247641819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6193152, while the sum is 56.

The spelling of 428247641819 in words is "four hundred twenty-eight billion, two hundred forty-seven million, six hundred forty-one thousand, eight hundred nineteen".