428896851217 has 2 divisors, whose sum is σ = 428896851218. Its totient is φ = 428896851216.

The previous prime is 428896851077. The next prime is 428896851221. The reversal of 428896851217 is 712158698824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220952643136 + 207944208081 = 470056^2 + 456009^2 .

It is a cyclic number.

It is not a de Polignac number, because 428896851217 - 2²³ = 428888462609 is a prime.

It is not a weakly prime, because it can be changed into another prime (428896851277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214448425608 + 214448425609.

It is an arithmetic number, because the mean of its divisors is an integer number (214448425609).

Almost surely, 2^428896851217 is an apocalyptic number.

It is an amenable number.

428896851217 is a deficient number, since it is larger than the sum of its proper divisors (1).

428896851217 is an equidigital number, since it uses as much as digits as its factorization.

428896851217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 61.

The spelling of 428896851217 in words is "four hundred twenty-eight billion, eight hundred ninety-six million, eight hundred fifty-one thousand, two hundred seventeen".