448644991 has 2 divisors, whose sum is σ = 448644992.
Its totient is φ = 448644990.
The previous prime is 448644941. The next prime is 448645049. The reversal of 448644991 is 199446844.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-448644991 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (448644941) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224322495 + 224322496.
It is an arithmetic number, because the mean of its divisors is an integer number (224322496).
Almost surely, 2448644991 is an apocalyptic number.
448644991 is a deficient number, since it is larger than the sum of its proper divisors (1).
448644991 is an equidigital number, since it uses as much as digits as its factorization.
448644991 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 995328, while the sum is 49.
The square root of 448644991 is about 21181.2414886380.
The cubic root of 448644991 is about 765.5395063687.
The spelling of 448644991 in words is "four hundred forty-eight million, six hundred forty-four thousand, nine hundred ninety-one".