431643343 has 2 divisors, whose sum is σ = 431643344. Its totient is φ = 431643342.

The previous prime is 431643341. The next prime is 431643353. The reversal of 431643343 is 343346134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431643343 - 2¹ = 431643341 is a prime.

Together with 431643341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431643341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215821671 + 215821672.

It is an arithmetic number, because the mean of its divisors is an integer number (215821672).

Almost surely, 2^431643343 is an apocalyptic number.

431643343 is a deficient number, since it is larger than the sum of its proper divisors (1).

431643343 is an equidigital number, since it uses as much as digits as its factorization.

431643343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 31.

The square root of 431643343 is about 20776.0280852717. The cubic root of 431643343 is about 755.7445357787.

Adding to 431643343 its reverse (343346134), we get a palindrome (774989477).

The spelling of 431643343 in words is "four hundred thirty-one million, six hundred forty-three thousand, three hundred forty-three".