447538789 has 2 divisors, whose sum is σ = 447538790. Its totient is φ = 447538788.

The previous prime is 447538781. The next prime is 447538823. The reversal of 447538789 is 987835744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262116100 + 185422689 = 16190^2 + 13617^2 .

It is a cyclic number.

It is not a de Polignac number, because 447538789 - 2³ = 447538781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447538781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223769394 + 223769395.

It is an arithmetic number, because the mean of its divisors is an integer number (223769395).

Almost surely, 2^447538789 is an apocalyptic number.

It is an amenable number.

447538789 is a deficient number, since it is larger than the sum of its proper divisors (1).

447538789 is an equidigital number, since it uses as much as digits as its factorization.

447538789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 55.

The square root of 447538789 is about 21155.1125971950. The cubic root of 447538789 is about 764.9098041097.

It can be divided in two parts, 4475 and 38789, that added together give a square (43264 = 208²).

The spelling of 447538789 in words is "four hundred forty-seven million, five hundred thirty-eight thousand, seven hundred eighty-nine".