447643431 has 12 divisors (see below), whose sum is σ = 647679760. Its totient is φ = 297928800.

The previous prime is 447643429. The next prime is 447643451. The reversal of 447643431 is 134346744.

447643431 is a `hidden beast` number, since 4 + 4 + 7 + 643 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 447643431 - 2¹ = 447643429 is a prime.

It is a super-2 number, since 2×447643431² = 400769282634903522, 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 (447643421) 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 11 ways as a sum of consecutive naturals, for example, 35971 + ... + 46788.

Almost surely, 2^447643431 is an apocalyptic number.

447643431 is a deficient number, since it is larger than the sum of its proper divisors (200036329).

447643431 is a wasteful number, since it uses less digits than its factorization.

447643431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83366 (or 83363 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 447643431 is about 21157.5856609397. The cubic root of 447643431 is about 764.9694156682.

The spelling of 447643431 in words is "four hundred forty-seven million, six hundred forty-three thousand, four hundred thirty-one".