431671 has 2 divisors, whose sum is σ = 431672. Its totient is φ = 431670.

The previous prime is 431663. The next prime is 431693. The reversal of 431671 is 176134.

It is an a-pointer prime, because the next prime (431693) can be obtained adding 431671 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431671 - 2³ = 431663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431611) 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, 215835 + 215836.

It is an arithmetic number, because the mean of its divisors is an integer number (215836).

2⁴³¹⁶⁷¹ is an apocalyptic number.

431671 is a deficient number, since it is larger than the sum of its proper divisors (1).

431671 is an equidigital number, since it uses as much as digits as its factorization.

431671 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 431671 is about 657.0167425568. The cubic root of 431671 is about 75.5760676558.

Subtracting from 431671 its sum of digits (22), we obtain a square (431649 = 657²).

The spelling of 431671 in words is "four hundred thirty-one thousand, six hundred seventy-one".