631668171 has 8 divisors (see below), whose sum is σ = 850907344. Its totient is φ = 416770560.

The previous prime is 631668143. The next prime is 631668173. The reversal of 631668171 is 171866136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631668171 - 2¹⁷ = 631537099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631668173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085050 + ... + 1085631.

It is an arithmetic number, because the mean of its divisors is an integer number (106363418).

Almost surely, 2^631668171 is an apocalyptic number.

631668171 is a deficient number, since it is larger than the sum of its proper divisors (219239173).

631668171 is a wasteful number, since it uses less digits than its factorization.

631668171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170781.

The product of its digits is 36288, while the sum is 39.

The square root of 631668171 is about 25133.0095889848. The cubic root of 631668171 is about 858.0178665706.

The spelling of 631668171 in words is "six hundred thirty-one million, six hundred sixty-eight thousand, one hundred seventy-one".