428632079 has 2 divisors, whose sum is σ = 428632080. Its totient is φ = 428632078.

The previous prime is 428632063. The next prime is 428632111. The reversal of 428632079 is 970236824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428632079 - 2⁴ = 428632063 is a prime.

It is a super-3 number, since 3×428632079³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428632019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214316039 + 214316040.

It is an arithmetic number, because the mean of its divisors is an integer number (214316040).

Almost surely, 2^428632079 is an apocalyptic number.

428632079 is a deficient number, since it is larger than the sum of its proper divisors (1).

428632079 is an equidigital number, since it uses as much as digits as its factorization.

428632079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 428632079 is about 20703.4315754659. The cubic root of 428632079 is about 753.9830050791.

The spelling of 428632079 in words is "four hundred twenty-eight million, six hundred thirty-two thousand, seventy-nine".