447779047 has 2 divisors, whose sum is σ = 447779048. Its totient is φ = 447779046.

The previous prime is 447779039. The next prime is 447779071. The reversal of 447779047 is 740977744.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 447779047 - 2³ = 447779039 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447779027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223889523 + 223889524.

It is an arithmetic number, because the mean of its divisors is an integer number (223889524).

Almost surely, 2^447779047 is an apocalyptic number.

447779047 is a deficient number, since it is larger than the sum of its proper divisors (1).

447779047 is an equidigital number, since it uses as much as digits as its factorization.

447779047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382976, while the sum is 49.

The square root of 447779047 is about 21160.7903207796. The cubic root of 447779047 is about 765.0466584098.

It can be divided in two parts, 44777 and 9047, that added together give a square (53824 = 232²).

The spelling of 447779047 in words is "four hundred forty-seven million, seven hundred seventy-nine thousand, forty-seven".