428159791 has 2 divisors, whose sum is σ = 428159792. Its totient is φ = 428159790.

The previous prime is 428159783. The next prime is 428159827. The reversal of 428159791 is 197951824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428159791 - 2³ = 428159783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428159491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214079895 + 214079896.

It is an arithmetic number, because the mean of its divisors is an integer number (214079896).

Almost surely, 2^428159791 is an apocalyptic number.

428159791 is a deficient number, since it is larger than the sum of its proper divisors (1).

428159791 is an equidigital number, since it uses as much as digits as its factorization.

428159791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 46.

The square root of 428159791 is about 20692.0223999492. The cubic root of 428159791 is about 753.7059780657.

The spelling of 428159791 in words is "four hundred twenty-eight million, one hundred fifty-nine thousand, seven hundred ninety-one".