631443 has 4 divisors (see below), whose sum is σ = 841928. Its totient is φ = 420960.

The previous prime is 631429. The next prime is 631453. The reversal of 631443 is 344136.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 631443 - 2⁸ = 631187 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631453) 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, 105238 + ... + 105243.

It is an arithmetic number, because the mean of its divisors is an integer number (210482).

2⁶³¹⁴⁴³ is an apocalyptic number.

631443 is a deficient number, since it is larger than the sum of its proper divisors (210485).

631443 is a wasteful number, since it uses less digits than its factorization.

631443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210484.

The product of its digits is 864, while the sum is 21.

The square root of 631443 is about 794.6338779589. The cubic root of 631443 is about 85.7915901799.

Adding to 631443 its reverse (344136), we get a palindrome (975579).

It can be divided in two parts, 63 and 1443, that multiplied together give a palindrome (90909).

The spelling of 631443 in words is "six hundred thirty-one thousand, four hundred forty-three".