631947 has 8 divisors (see below), whose sum is σ = 846544. Its totient is φ = 419328.

The previous prime is 631937. The next prime is 631979. The reversal of 631947 is 749136.

It is a happy number.

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

It is not a de Polignac number, because 631947 - 2⁴ = 631931 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631947.

It is not an unprimeable number, because it can be changed into a prime (631927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (105818).

2⁶³¹⁹⁴⁷ is an apocalyptic number.

631947 is a deficient number, since it is larger than the sum of its proper divisors (214597).

631947 is a wasteful number, since it uses less digits than its factorization.

631947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its digits is 4536, while the sum is 30.

The square root of 631947 is about 794.9509418826. The cubic root of 631947 is about 85.8144095859.

The spelling of 631947 in words is "six hundred thirty-one thousand, nine hundred forty-seven".