431616443 has 2 divisors, whose sum is σ = 431616444. Its totient is φ = 431616442.

The previous prime is 431616439. The next prime is 431616461. The reversal of 431616443 is 344616134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431616443 - 2² = 431616439 is a prime.

It is not a weakly prime, because it can be changed into another prime (431616743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215808221 + 215808222.

It is an arithmetic number, because the mean of its divisors is an integer number (215808222).

Almost surely, 2^431616443 is an apocalyptic number.

431616443 is a deficient number, since it is larger than the sum of its proper divisors (1).

431616443 is an equidigital number, since it uses as much as digits as its factorization.

431616443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 431616443 is about 20775.3806944662. The cubic root of 431616443 is about 755.7288361271.

The spelling of 431616443 in words is "four hundred thirty-one million, six hundred sixteen thousand, four hundred forty-three".