447631 has 4 divisors (see below), whose sum is σ = 449064. Its totient is φ = 446200.

The previous prime is 447617. The next prime is 447637. The reversal of 447631 is 136744.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 447631 - 2⁹ = 447119 is a prime.

It is a super-2 number, since 2×447631² = 400747024322, which contains 22 as substring.

It is a Duffinian number.

447631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 447596 and 447605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (112266).

2⁴⁴⁷⁶³¹ is an apocalyptic number.

447631 is a deficient number, since it is larger than the sum of its proper divisors (1433).

447631 is an equidigital number, since it uses as much as digits as its factorization.

447631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its digits is 2016, while the sum is 25.

The square root of 447631 is about 669.0523148454. The cubic root of 447631 is about 76.4962334569.

The spelling of 447631 in words is "four hundred forty-seven thousand, six hundred thirty-one".