447705247 has 4 divisors (see below), whose sum is σ = 488405736. Its totient is φ = 407004760.

The previous prime is 447705229. The next prime is 447705301. The reversal of 447705247 is 742507744.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 447705247 - 2¹⁵ = 447672479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447705347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20350228 + ... + 20350249.

It is an arithmetic number, because the mean of its divisors is an integer number (122101434).

Almost surely, 2^447705247 is an apocalyptic number.

447705247 is a deficient number, since it is larger than the sum of its proper divisors (40700489).

447705247 is a wasteful number, since it uses less digits than its factorization.

447705247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40700488.

The product of its (nonzero) digits is 219520, while the sum is 40.

The square root of 447705247 is about 21159.0464577211. The cubic root of 447705247 is about 765.0046261130.

The spelling of 447705247 in words is "four hundred forty-seven million, seven hundred five thousand, two hundred forty-seven".