431663 has 2 divisors, whose sum is σ = 431664. Its totient is φ = 431662.

The previous prime is 431659. The next prime is 431671. The reversal of 431663 is 366134.

431663 is nontrivially palindromic in base 15.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431663 - 2² = 431659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431603) 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, 215831 + 215832.

It is an arithmetic number, because the mean of its divisors is an integer number (215832).

2⁴³¹⁶⁶³ is an apocalyptic number.

431663 is a deficient number, since it is larger than the sum of its proper divisors (1).

431663 is an equidigital number, since it uses as much as digits as its factorization.

431663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 431663 is about 657.0106544037. The cubic root of 431663 is about 75.5756007785.

Adding to 431663 its reverse (366134), we get a palindrome (797797).

The spelling of 431663 in words is "four hundred thirty-one thousand, six hundred sixty-three".