100009243 has 2 divisors, whose sum is σ = 100009244. Its totient is φ = 100009242.

The previous prime is 100009213. The next prime is 100009297. The reversal of 100009243 is 342900001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100009243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100009243.

It is not a weakly prime, because it can be changed into another prime (100009213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50004621 + 50004622.

It is an arithmetic number, because the mean of its divisors is an integer number (50004622).

Almost surely, 2^100009243 is an apocalyptic number.

100009243 is a deficient number, since it is larger than the sum of its proper divisors (1).

100009243 is an equidigital number, since it uses as much as digits as its factorization.

100009243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 100009243 is about 10000.4621393214. The cubic root of 100009243 is about 464.1731836559.

Adding to 100009243 its reverse (342900001), we get a palindrome (442909244).

The spelling of 100009243 in words is "one hundred million, nine thousand, two hundred forty-three".