428668793447 has 2 divisors, whose sum is σ = 428668793448. Its totient is φ = 428668793446.

The previous prime is 428668793437. The next prime is 428668793459. The reversal of 428668793447 is 744397866824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428668793447 - 2³⁸ = 153790886503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428668793437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214334396723 + 214334396724.

It is an arithmetic number, because the mean of its divisors is an integer number (214334396724).

Almost surely, 2^428668793447 is an apocalyptic number.

428668793447 is a deficient number, since it is larger than the sum of its proper divisors (1).

428668793447 is an equidigital number, since it uses as much as digits as its factorization.

428668793447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 390168576, while the sum is 68.

The spelling of 428668793447 in words is "four hundred twenty-eight billion, six hundred sixty-eight million, seven hundred ninety-three thousand, four hundred forty-seven".