447138247 has 4 divisors (see below), whose sum is σ = 447312240. Its totient is φ = 446964256.

The previous prime is 447138221. The next prime is 447138259. The reversal of 447138247 is 742831744.

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 447138247 - 2¹¹ = 447136199 is a prime.

It is a super-2 number, since 2×447138247² = 399865223860466018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447138277) 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, 83083 + ... + 88300.

It is an arithmetic number, because the mean of its divisors is an integer number (111828060).

Almost surely, 2^447138247 is an apocalyptic number.

447138247 is a deficient number, since it is larger than the sum of its proper divisors (173993).

447138247 is a wasteful number, since it uses less digits than its factorization.

447138247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173992.

The product of its digits is 150528, while the sum is 40.

The square root of 447138247 is about 21145.6436884764. The cubic root of 447138247 is about 764.6815408786.

The spelling of 447138247 in words is "four hundred forty-seven million, one hundred thirty-eight thousand, two hundred forty-seven".