100643843 has 2 divisors, whose sum is σ = 100643844. Its totient is φ = 100643842.

The previous prime is 100643813. The next prime is 100643941. The reversal of 100643843 is 348346001.

It is a weak prime.

It is an emirp because it is prime and its reverse (348346001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100643843 - 2¹⁰ = 100642819 is a prime.

It is not a weakly prime, because it can be changed into another prime (100643813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50321921 + 50321922.

It is an arithmetic number, because the mean of its divisors is an integer number (50321922).

Almost surely, 2^100643843 is an apocalyptic number.

100643843 is a deficient number, since it is larger than the sum of its proper divisors (1).

100643843 is an equidigital number, since it uses as much as digits as its factorization.

100643843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 100643843 is about 10032.1404994149. The cubic root of 100643843 is about 465.1529045849.

Adding to 100643843 its reverse (348346001), we get a palindrome (448989844).

The spelling of 100643843 in words is "one hundred million, six hundred forty-three thousand, eight hundred forty-three".