428106691819 has 2 divisors, whose sum is σ = 428106691820. Its totient is φ = 428106691818.

The previous prime is 428106691693. The next prime is 428106691823. The reversal of 428106691819 is 918196601824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428106691819 - 2⁹ = 428106691307 is a prime.

It is a super-2 number, since 2×428106691819² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428106691819.

It is not a weakly prime, because it can be changed into another prime (428106691889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214053345909 + 214053345910.

It is an arithmetic number, because the mean of its divisors is an integer number (214053345910).

Almost surely, 2^428106691819 is an apocalyptic number.

428106691819 is a deficient number, since it is larger than the sum of its proper divisors (1).

428106691819 is an equidigital number, since it uses as much as digits as its factorization.

428106691819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 428106691819 in words is "four hundred twenty-eight billion, one hundred six million, six hundred ninety-one thousand, eight hundred nineteen".