428600647 has 2 divisors, whose sum is σ = 428600648. Its totient is φ = 428600646.

The previous prime is 428600639. The next prime is 428600663. The reversal of 428600647 is 746006824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428600647 - 2³ = 428600639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428600747) 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, 214300323 + 214300324.

It is an arithmetic number, because the mean of its divisors is an integer number (214300324).

Almost surely, 2^428600647 is an apocalyptic number.

428600647 is a deficient number, since it is larger than the sum of its proper divisors (1).

428600647 is an equidigital number, since it uses as much as digits as its factorization.

428600647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 428600647 is about 20702.6724603371. The cubic root of 428600647 is about 753.9645745305.

The spelling of 428600647 in words is "four hundred twenty-eight million, six hundred thousand, six hundred forty-seven".