448119781 has 2 divisors, whose sum is σ = 448119782. Its totient is φ = 448119780.

The previous prime is 448119757. The next prime is 448119811. The reversal of 448119781 is 187911844.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348419556 + 99700225 = 18666^2 + 9985^2 .

It is a cyclic number.

It is not a de Polignac number, because 448119781 - 2⁷ = 448119653 is a prime.

It is a super-2 number, since 2×448119781² = 401622676246975922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (448119701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224059890 + 224059891.

It is an arithmetic number, because the mean of its divisors is an integer number (224059891).

Almost surely, 2^448119781 is an apocalyptic number.

It is an amenable number.

448119781 is a deficient number, since it is larger than the sum of its proper divisors (1).

448119781 is an equidigital number, since it uses as much as digits as its factorization.

448119781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 43.

The square root of 448119781 is about 21168.8398595672. The cubic root of 448119781 is about 765.2406613209.

It can be divided in two parts, 448119 and 781, that added together give a square (448900 = 670²).

The spelling of 448119781 in words is "four hundred forty-eight million, one hundred nineteen thousand, seven hundred eighty-one".