428516663 has 2 divisors, whose sum is σ = 428516664. Its totient is φ = 428516662.

The previous prime is 428516651. The next prime is 428516681. The reversal of 428516663 is 366615824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428516663 - 2¹⁴ = 428500279 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428516663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428516623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214258331 + 214258332.

It is an arithmetic number, because the mean of its divisors is an integer number (214258332).

Almost surely, 2^428516663 is an apocalyptic number.

428516663 is a deficient number, since it is larger than the sum of its proper divisors (1).

428516663 is an equidigital number, since it uses as much as digits as its factorization.

428516663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The square root of 428516663 is about 20700.6440237979. The cubic root of 428516663 is about 753.9153250348.

The spelling of 428516663 in words is "four hundred twenty-eight million, five hundred sixteen thousand, six hundred sixty-three".