447921823 has 2 divisors, whose sum is σ = 447921824. Its totient is φ = 447921822.

The previous prime is 447921809. The next prime is 447921829. The reversal of 447921823 is 328129744.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 447921823 - 2⁹ = 447921311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447921829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223960911 + 223960912.

It is an arithmetic number, because the mean of its divisors is an integer number (223960912).

Almost surely, 2^447921823 is an apocalyptic number.

447921823 is a deficient number, since it is larger than the sum of its proper divisors (1).

447921823 is an equidigital number, since it uses as much as digits as its factorization.

447921823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 447921823 is about 21164.1636499059. The cubic root of 447921823 is about 765.1279624183.

The spelling of 447921823 in words is "four hundred forty-seven million, nine hundred twenty-one thousand, eight hundred twenty-three".