431026643 has 2 divisors, whose sum is σ = 431026644. Its totient is φ = 431026642.

The previous prime is 431026627. The next prime is 431026667. The reversal of 431026643 is 346620134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431026643 - 2⁴ = 431026627 is a prime.

It is not a weakly prime, because it can be changed into another prime (431026243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215513321 + 215513322.

It is an arithmetic number, because the mean of its divisors is an integer number (215513322).

Almost surely, 2^431026643 is an apocalyptic number.

431026643 is a deficient number, since it is larger than the sum of its proper divisors (1).

431026643 is an equidigital number, since it uses as much as digits as its factorization.

431026643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 431026643 is about 20761.1811561867. The cubic root of 431026643 is about 755.3844469847.

Adding to 431026643 its reverse (346620134), we get a palindrome (777646777).

The spelling of 431026643 in words is "four hundred thirty-one million, twenty-six thousand, six hundred forty-three".