447163421 has 2 divisors, whose sum is σ = 447163422. Its totient is φ = 447163420.

The previous prime is 447163411. The next prime is 447163459. The reversal of 447163421 is 124361744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444619396 + 2544025 = 21086^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 447163421 - 2⁶ = 447163357 is a prime.

It is a super-3 number, since 3×447163421³ (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 (447163411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223581710 + 223581711.

It is an arithmetic number, because the mean of its divisors is an integer number (223581711).

Almost surely, 2^447163421 is an apocalyptic number.

It is an amenable number.

447163421 is a deficient number, since it is larger than the sum of its proper divisors (1).

447163421 is an equidigital number, since it uses as much as digits as its factorization.

447163421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 447163421 is about 21146.2389327275. The cubic root of 447163421 is about 764.6958911994.

The spelling of 447163421 in words is "four hundred forty-seven million, one hundred sixty-three thousand, four hundred twenty-one".