631944437 has 4 divisors (see below), whose sum is σ = 632012640. Its totient is φ = 631876236.

The previous prime is 631944431. The next prime is 631944479. The reversal of 631944437 is 734449136.

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, 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 631944437 - 2¹⁰ = 631943413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631944394 and 631944403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631944431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17513 + ... + 39630.

It is an arithmetic number, because the mean of its divisors is an integer number (158003160).

Almost surely, 2^631944437 is an apocalyptic number.

It is an amenable number.

631944437 is a deficient number, since it is larger than the sum of its proper divisors (68203).

631944437 is a wasteful number, since it uses less digits than its factorization.

631944437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68202.

The product of its digits is 217728, while the sum is 41.

The square root of 631944437 is about 25138.5050669287. The cubic root of 631944437 is about 858.1429357266.

The spelling of 631944437 in words is "six hundred thirty-one million, nine hundred forty-four thousand, four hundred thirty-seven".