631445 has 8 divisors (see below), whose sum is σ = 774144. Its totient is φ = 494224.

The previous prime is 631429. The next prime is 631453. The reversal of 631445 is 544136.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631445 - 2⁴ = 631429 is a prime.

It is a super-3 number, since 3×631445³ = 755314532653338375, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109 + ... + 1578.

It is an arithmetic number, because the mean of its divisors is an integer number (96768).

2⁶³¹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

631445 is a deficient number, since it is larger than the sum of its proper divisors (142699).

631445 is a wasteful number, since it uses less digits than its factorization.

631445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739.

The product of its digits is 1440, while the sum is 23.

The square root of 631445 is about 794.6351363991. The cubic root of 631445 is about 85.7916807571.

The spelling of 631445 in words is "six hundred thirty-one thousand, four hundred forty-five".