448731421 has 2 divisors, whose sum is σ = 448731422. Its totient is φ = 448731420.

The previous prime is 448731401. The next prime is 448731457. The reversal of 448731421 is 124137844.

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., 268796025 + 179935396 = 16395^2 + 13414^2 .

It is a cyclic number.

It is not a de Polignac number, because 448731421 - 2²⁵ = 415176989 is a prime.

It is a super-3 number, since 3×448731421³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (448731401) 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, 224365710 + 224365711.

It is an arithmetic number, because the mean of its divisors is an integer number (224365711).

Almost surely, 2^448731421 is an apocalyptic number.

It is an amenable number.

448731421 is a deficient number, since it is larger than the sum of its proper divisors (1).

448731421 is an equidigital number, since it uses as much as digits as its factorization.

448731421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 448731421 is about 21183.2816390662. The cubic root of 448731421 is about 765.5886627786.

The spelling of 448731421 in words is "four hundred forty-eight million, seven hundred thirty-one thousand, four hundred twenty-one".