447729109 has 4 divisors (see below), whose sum is σ = 467195616. Its totient is φ = 428262604.

The previous prime is 447729089. The next prime is 447729151. The reversal of 447729109 is 901927744.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 447729109 - 2¹⁵ = 447696341 is a prime.

It is a super-2 number, since 2×447729109² = 400922710091867762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447729179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9733219 + ... + 9733264.

It is an arithmetic number, because the mean of its divisors is an integer number (116798904).

Almost surely, 2^447729109 is an apocalyptic number.

It is an amenable number.

447729109 is a deficient number, since it is larger than the sum of its proper divisors (19466507).

447729109 is a wasteful number, since it uses less digits than its factorization.

447729109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19466506.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 447729109 is about 21159.6103224989. The cubic root of 447729109 is about 765.0182170609.

The spelling of 447729109 in words is "four hundred forty-seven million, seven hundred twenty-nine thousand, one hundred nine".