447749389 has 2 divisors, whose sum is σ = 447749390. Its totient is φ = 447749388.

The previous prime is 447749377. The next prime is 447749413. The reversal of 447749389 is 983947744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419553289 + 28196100 = 20483^2 + 5310^2 .

It is a cyclic number.

It is not a de Polignac number, because 447749389 - 2¹⁷ = 447618317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447749329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223874694 + 223874695.

It is an arithmetic number, because the mean of its divisors is an integer number (223874695).

Almost surely, 2^447749389 is an apocalyptic number.

It is an amenable number.

447749389 is a deficient number, since it is larger than the sum of its proper divisors (1).

447749389 is an equidigital number, since it uses as much as digits as its factorization.

447749389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The square root of 447749389 is about 21160.0895319467. The cubic root of 447749389 is about 765.0297674492.

The spelling of 447749389 in words is "four hundred forty-seven million, seven hundred forty-nine thousand, three hundred eighty-nine".