428019607 has 2 divisors, whose sum is σ = 428019608. Its totient is φ = 428019606.

The previous prime is 428019587. The next prime is 428019637. The reversal of 428019607 is 706910824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428019607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428019637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214009803 + 214009804.

It is an arithmetic number, because the mean of its divisors is an integer number (214009804).

Almost surely, 2^428019607 is an apocalyptic number.

428019607 is a deficient number, since it is larger than the sum of its proper divisors (1).

428019607 is an equidigital number, since it uses as much as digits as its factorization.

428019607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 428019607 is about 20688.6347302088. The cubic root of 428019607 is about 753.6237120097.

The spelling of 428019607 in words is "four hundred twenty-eight million, nineteen thousand, six hundred seven".