428809471 has 2 divisors, whose sum is σ = 428809472. Its totient is φ = 428809470.

The previous prime is 428809441. The next prime is 428809489. The reversal of 428809471 is 174908824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428809471 - 2⁵ = 428809439 is a prime.

It is a super-3 number, since 3×428809471³ (a number of 27 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428809421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214404735 + 214404736.

It is an arithmetic number, because the mean of its divisors is an integer number (214404736).

Almost surely, 2^428809471 is an apocalyptic number.

428809471 is a deficient number, since it is larger than the sum of its proper divisors (1).

428809471 is an equidigital number, since it uses as much as digits as its factorization.

428809471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 428809471 is about 20707.7152530162. The cubic root of 428809471 is about 754.0870042219.

The spelling of 428809471 in words is "four hundred twenty-eight million, eight hundred nine thousand, four hundred seventy-one".