447915209 has 12 divisors (see below), whose sum is σ = 515801664. Its totient is φ = 381011832.

The previous prime is 447915199. The next prime is 447915233. The reversal of 447915209 is 902519744.

It is not a de Polignac number, because 447915209 - 2⁸ = 447914953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447915289) 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, 723302 + ... + 723920.

It is an arithmetic number, because the mean of its divisors is an integer number (42983472).

Almost surely, 2^447915209 is an apocalyptic number.

It is an amenable number.

447915209 is a deficient number, since it is larger than the sum of its proper divisors (67886455).

447915209 is an frugal number, since it uses more digits than its factorization.

447915209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 447915209 is about 21164.0073946311. The cubic root of 447915209 is about 765.1241964477.

The spelling of 447915209 in words is "four hundred forty-seven million, nine hundred fifteen thousand, two hundred nine".