631169 has 12 divisors (see below), whose sum is σ = 801648. Its totient is φ = 491400.

The previous prime is 631157. The next prime is 631171. The reversal of 631169 is 961136.

It is not a de Polignac number, because 631169 - 2⁴ = 631153 is a prime.

It is a super-2 number, since 2×631169² = 796748613122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47 + ... + 1124.

It is an arithmetic number, because the mean of its divisors is an integer number (66804).

2⁶³¹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

631169 is a deficient number, since it is larger than the sum of its proper divisors (170479).

631169 is a wasteful number, since it uses less digits than its factorization.

631169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1189 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 631169 is about 794.4614528094. The cubic root of 631169 is about 85.7791792964.

The spelling of 631169 in words is "six hundred thirty-one thousand, one hundred sixty-nine".