631663441 has 4 divisors (see below), whose sum is σ = 668820132. Its totient is φ = 594506752.

The previous prime is 631663411. The next prime is 631663447. The reversal of 631663441 is 144366136.

631663441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 194017041 + 437646400 = 13929^2 + 20920^2 .

It is a cyclic number.

It is not a de Polignac number, because 631663441 - 2¹³ = 631655249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631663397 and 631663406.

It is not an unprimeable number, because it can be changed into a prime (631663447) 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, 18578320 + ... + 18578353.

It is an arithmetic number, because the mean of its divisors is an integer number (167205033).

Almost surely, 2^631663441 is an apocalyptic number.

It is an amenable number.

631663441 is a deficient number, since it is larger than the sum of its proper divisors (37156691).

631663441 is a wasteful number, since it uses less digits than its factorization.

631663441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37156690.

The product of its digits is 31104, while the sum is 34.

The square root of 631663441 is about 25132.9154894533. The cubic root of 631663441 is about 858.0157249216.

The spelling of 631663441 in words is "six hundred thirty-one million, six hundred sixty-three thousand, four hundred forty-one".