428354003809 has 2 divisors, whose sum is σ = 428354003810. Its totient is φ = 428354003808.

The previous prime is 428354003771. The next prime is 428354003839. The reversal of 428354003809 is 908300453824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424406646225 + 3947357584 = 651465^2 + 62828^2 .

It is a cyclic number.

It is not a de Polignac number, because 428354003809 - 2¹³ = 428353995617 is a prime.

It is not a weakly prime, because it can be changed into another prime (428354003839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214177001904 + 214177001905.

It is an arithmetic number, because the mean of its divisors is an integer number (214177001905).

Almost surely, 2^428354003809 is an apocalyptic number.

It is an amenable number.

428354003809 is a deficient number, since it is larger than the sum of its proper divisors (1).

428354003809 is an equidigital number, since it uses as much as digits as its factorization.

428354003809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 428354003809 in words is "four hundred twenty-eight billion, three hundred fifty-four million, three thousand, eight hundred nine".