841968643 has 2 divisors, whose sum is σ = 841968644. Its totient is φ = 841968642.

The previous prime is 841968637. The next prime is 841968691. The reversal of 841968643 is 346869148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 841968643 - 2⁹ = 841968131 is a prime.

It is a super-2 number, since 2×841968643² = 1417822391590522898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (841968143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420984321 + 420984322.

It is an arithmetic number, because the mean of its divisors is an integer number (420984322).

Almost surely, 2^841968643 is an apocalyptic number.

841968643 is a deficient number, since it is larger than the sum of its proper divisors (1).

841968643 is an equidigital number, since it uses as much as digits as its factorization.

841968643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 841968643 is about 29016.6959352715. The cubic root of 841968643 is about 944.2753206056.

The spelling of 841968643 in words is "eight hundred forty-one million, nine hundred sixty-eight thousand, six hundred forty-three".