631949 has 4 divisors (see below), whose sum is σ = 642720. Its totient is φ = 621180.

The previous prime is 631937. The next prime is 631979. The reversal of 631949 is 949136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631949 - 2¹⁶ = 566413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631979) 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, 5297 + ... + 5414.

It is an arithmetic number, because the mean of its divisors is an integer number (160680).

2⁶³¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

631949 is a deficient number, since it is larger than the sum of its proper divisors (10771).

631949 is a wasteful number, since it uses less digits than its factorization.

631949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10770.

The product of its digits is 5832, while the sum is 32.

The square root of 631949 is about 794.9521998208. The cubic root of 631949 is about 85.8145001149.

The spelling of 631949 in words is "six hundred thirty-one thousand, nine hundred forty-nine".