631434163 has 4 divisors (see below), whose sum is σ = 664667560. Its totient is φ = 598200768.

The previous prime is 631434161. The next prime is 631434173. The reversal of 631434163 is 361434136.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 631434163 - 2¹ = 631434161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631434161) 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, 16616670 + ... + 16616707.

It is an arithmetic number, because the mean of its divisors is an integer number (166166890).

Almost surely, 2^631434163 is an apocalyptic number.

631434163 is a deficient number, since it is larger than the sum of its proper divisors (33233397).

631434163 is a wasteful number, since it uses less digits than its factorization.

631434163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33233396.

The product of its digits is 15552, while the sum is 31.

The square root of 631434163 is about 25128.3537662140. The cubic root of 631434163 is about 857.9118996230.

Adding to 631434163 its reverse (361434136), we get a palindrome (992868299).

The spelling of 631434163 in words is "six hundred thirty-one million, four hundred thirty-four thousand, one hundred sixty-three".