100666243 has 2 divisors, whose sum is σ = 100666244. Its totient is φ = 100666242.

The previous prime is 100666229. The next prime is 100666259. The reversal of 100666243 is 342666001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100666243 - 2²¹ = 98569091 is a prime.

It is not a weakly prime, because it can be changed into another prime (100666273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50333121 + 50333122.

It is an arithmetic number, because the mean of its divisors is an integer number (50333122).

Almost surely, 2^100666243 is an apocalyptic number.

100666243 is a deficient number, since it is larger than the sum of its proper divisors (1).

100666243 is an equidigital number, since it uses as much as digits as its factorization.

100666243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 100666243 is about 10033.2568490994. The cubic root of 100666243 is about 465.1874112566.

The spelling of 100666243 in words is "one hundred million, six hundred sixty-six thousand, two hundred forty-three".