100866643 has 2 divisors, whose sum is σ = 100866644. Its totient is φ = 100866642.

The previous prime is 100866631. The next prime is 100866659. The reversal of 100866643 is 346668001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100866643 - 2⁹ = 100866131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100866599 and 100866608.

It is not a weakly prime, because it can be changed into another prime (100866673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50433321 + 50433322.

It is an arithmetic number, because the mean of its divisors is an integer number (50433322).

Almost surely, 2^100866643 is an apocalyptic number.

100866643 is a deficient number, since it is larger than the sum of its proper divisors (1).

100866643 is an equidigital number, since it uses as much as digits as its factorization.

100866643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 100866643 is about 10043.2386708671. The cubic root of 100866643 is about 465.4958952183.

The spelling of 100866643 in words is "one hundred million, eight hundred sixty-six thousand, six hundred forty-three".