428666599 has 2 divisors, whose sum is σ = 428666600. Its totient is φ = 428666598.

The previous prime is 428666569. The next prime is 428666627. The reversal of 428666599 is 995666824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428666599 - 2⁷ = 428666471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428666569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214333299 + 214333300.

It is an arithmetic number, because the mean of its divisors is an integer number (214333300).

Almost surely, 2^428666599 is an apocalyptic number.

428666599 is a deficient number, since it is larger than the sum of its proper divisors (1).

428666599 is an equidigital number, since it uses as much as digits as its factorization.

428666599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The square root of 428666599 is about 20704.2652369023. The cubic root of 428666599 is about 754.0032452773.

The spelling of 428666599 in words is "four hundred twenty-eight million, six hundred sixty-six thousand, five hundred ninety-nine".