428819243 has 2 divisors, whose sum is σ = 428819244. Its totient is φ = 428819242.

The previous prime is 428819231. The next prime is 428819273. The reversal of 428819243 is 342918824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428819243 - 2¹² = 428815147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428819243.

It is not a weakly prime, because it can be changed into another prime (428819273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214409621 + 214409622.

It is an arithmetic number, because the mean of its divisors is an integer number (214409622).

Almost surely, 2^428819243 is an apocalyptic number.

428819243 is a deficient number, since it is larger than the sum of its proper divisors (1).

428819243 is an equidigital number, since it uses as much as digits as its factorization.

428819243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 41.

The square root of 428819243 is about 20707.9512023763. The cubic root of 428819243 is about 754.0927323931.

The spelling of 428819243 in words is "four hundred twenty-eight million, eight hundred nineteen thousand, two hundred forty-three".