428294089 has 2 divisors, whose sum is σ = 428294090. Its totient is φ = 428294088.

The previous prime is 428294071. The next prime is 428294117. The reversal of 428294089 is 980492824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409657600 + 18636489 = 20240^2 + 4317^2 .

It is a cyclic number.

It is not a de Polignac number, because 428294089 - 2¹⁷ = 428163017 is a prime.

It is not a weakly prime, because it can be changed into another prime (428294059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214147044 + 214147045.

It is an arithmetic number, because the mean of its divisors is an integer number (214147045).

Almost surely, 2^428294089 is an apocalyptic number.

It is an amenable number.

428294089 is a deficient number, since it is larger than the sum of its proper divisors (1).

428294089 is an equidigital number, since it uses as much as digits as its factorization.

428294089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 428294089 is about 20695.2673092183. The cubic root of 428294089 is about 753.7847731217.

The spelling of 428294089 in words is "four hundred twenty-eight million, two hundred ninety-four thousand, eighty-nine".