428564726987 has 2 divisors, whose sum is σ = 428564726988. Its totient is φ = 428564726986.

The previous prime is 428564726963. The next prime is 428564727001. The reversal of 428564726987 is 789627465824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428564726987 is a prime.

It is not a weakly prime, because it can be changed into another prime (428564726587) 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, 214282363493 + 214282363494.

It is an arithmetic number, because the mean of its divisors is an integer number (214282363494).

Almost surely, 2^428564726987 is an apocalyptic number.

428564726987 is a deficient number, since it is larger than the sum of its proper divisors (1).

428564726987 is an equidigital number, since it uses as much as digits as its factorization.

428564726987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 325140480, while the sum is 68.

The spelling of 428564726987 in words is "four hundred twenty-eight billion, five hundred sixty-four million, seven hundred twenty-six thousand, nine hundred eighty-seven".