447820889 has 4 divisors (see below), whose sum is σ = 447941556. Its totient is φ = 447700224.

The previous prime is 447820873. The next prime is 447820931. The reversal of 447820889 is 988028744.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60715264 + 387105625 = 7792^2 + 19675^2 .

It is a cyclic number.

It is not a de Polignac number, because 447820889 - 2⁴ = 447820873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447820859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54584 + ... + 62249.

It is an arithmetic number, because the mean of its divisors is an integer number (111985389).

Almost surely, 2^447820889 is an apocalyptic number.

It is an amenable number.

447820889 is a deficient number, since it is larger than the sum of its proper divisors (120667).

447820889 is a wasteful number, since it uses less digits than its factorization.

447820889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120666.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 447820889 is about 21161.7789658620. The cubic root of 447820889 is about 765.0704871899.

The spelling of 447820889 in words is "four hundred forty-seven million, eight hundred twenty thousand, eight hundred eighty-nine".