447779911 has 2 divisors, whose sum is σ = 447779912. Its totient is φ = 447779910.

The previous prime is 447779909. The next prime is 447779921. The reversal of 447779911 is 119977744.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 447779911 - 2¹ = 447779909 is a prime.

Together with 447779909, it forms a pair of twin primes.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447779921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223889955 + 223889956.

It is an arithmetic number, because the mean of its divisors is an integer number (223889956).

Almost surely, 2^447779911 is an apocalyptic number.

447779911 is a deficient number, since it is larger than the sum of its proper divisors (1).

447779911 is an equidigital number, since it uses as much as digits as its factorization.

447779911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 49.

The square root of 447779911 is about 21160.8107358863. The cubic root of 447779911 is about 765.0471504679.

The spelling of 447779911 in words is "four hundred forty-seven million, seven hundred seventy-nine thousand, nine hundred eleven".