631242671 has 4 divisors (see below), whose sum is σ = 631701144. Its totient is φ = 630784200.

The previous prime is 631242641. The next prime is 631242679. The reversal of 631242671 is 176242136.

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 631242671 - 2¹⁴ = 631226287 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 (631242679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227165 + ... + 229926.

It is an arithmetic number, because the mean of its divisors is an integer number (157925286).

Almost surely, 2^631242671 is an apocalyptic number.

631242671 is a deficient number, since it is larger than the sum of its proper divisors (458473).

631242671 is a wasteful number, since it uses less digits than its factorization.

631242671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458472.

The product of its digits is 12096, while the sum is 32.

The square root of 631242671 is about 25124.5431998275. The cubic root of 631242671 is about 857.8251659168.

The spelling of 631242671 in words is "six hundred thirty-one million, two hundred forty-two thousand, six hundred seventy-one".