631471 has 2 divisors, whose sum is σ = 631472. Its totient is φ = 631470.

The previous prime is 631469. The next prime is 631483. The reversal of 631471 is 174136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631471 - 2¹ = 631469 is a prime.

It is a super-3 number, since 3×631471³ = 755407837627500333, which contains 333 as substring.

Together with 631469, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315735 + 315736.

It is an arithmetic number, because the mean of its divisors is an integer number (315736).

2⁶³¹⁴⁷¹ is an apocalyptic number.

631471 is a deficient number, since it is larger than the sum of its proper divisors (1).

631471 is an equidigital number, since it uses as much as digits as its factorization.

631471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 22.

The square root of 631471 is about 794.6514959402. The cubic root of 631471 is about 85.7928582432.

The spelling of 631471 in words is "six hundred thirty-one thousand, four hundred seventy-one".