447428789 has 2 divisors, whose sum is σ = 447428790. Its totient is φ = 447428788.

The previous prime is 447428743. The next prime is 447428843. The reversal of 447428789 is 987824744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440580100 + 6848689 = 20990^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 447428789 - 2⁸ = 447428533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 447428789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447428489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223714394 + 223714395.

It is an arithmetic number, because the mean of its divisors is an integer number (223714395).

Almost surely, 2^447428789 is an apocalyptic number.

It is an amenable number.

447428789 is a deficient number, since it is larger than the sum of its proper divisors (1).

447428789 is an equidigital number, since it uses as much as digits as its factorization.

447428789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 53.

The square root of 447428789 is about 21152.5125930704. The cubic root of 447428789 is about 764.8471302327.

The spelling of 447428789 in words is "four hundred forty-seven million, four hundred twenty-eight thousand, seven hundred eighty-nine".