428247641779 has 2 divisors, whose sum is σ = 428247641780. Its totient is φ = 428247641778.

The previous prime is 428247641747. The next prime is 428247641819. The reversal of 428247641779 is 977146742824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428247641779 - 2⁵ = 428247641747 is a prime.

It is not a weakly prime, because it can be changed into another prime (428244641779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214123820889 + 214123820890.

It is an arithmetic number, because the mean of its divisors is an integer number (214123820890).

Almost surely, 2^428247641779 is an apocalyptic number.

428247641779 is a deficient number, since it is larger than the sum of its proper divisors (1).

428247641779 is an equidigital number, since it uses as much as digits as its factorization.

428247641779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 61.

The spelling of 428247641779 in words is "four hundred twenty-eight billion, two hundred forty-seven million, six hundred forty-one thousand, seven hundred seventy-nine".