447520779 has 12 divisors (see below), whose sum is σ = 668709600. Its totient is φ = 288059184.

The previous prime is 447520757. The next prime is 447520783. The reversal of 447520779 is 977025744.

It is not a de Polignac number, because 447520779 - 2¹⁵ = 447488011 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (447520709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 857059 + ... + 857580.

It is an arithmetic number, because the mean of its divisors is an integer number (55725800).

Almost surely, 2^447520779 is an apocalyptic number.

447520779 is a deficient number, since it is larger than the sum of its proper divisors (221188821).

447520779 is a wasteful number, since it uses less digits than its factorization.

447520779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714674 (or 1714671 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 447520779 is about 21154.6869274873. The cubic root of 447520779 is about 764.8995433898.

The spelling of 447520779 in words is "four hundred forty-seven million, five hundred twenty thousand, seven hundred seventy-nine".