100766689 has 2 divisors, whose sum is σ = 100766690. Its totient is φ = 100766688.

The previous prime is 100766681. The next prime is 100766717. The reversal of 100766689 is 986667001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 9659664 = 9545^2 + 3108^2 .

It is an emirp because it is prime and its reverse (986667001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100766689 - 2³ = 100766681 is a prime.

It is a super-2 number, since 2×100766689² = 20307851224045442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100766681) 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, 50383344 + 50383345.

It is an arithmetic number, because the mean of its divisors is an integer number (50383345).

Almost surely, 2^100766689 is an apocalyptic number.

It is an amenable number.

100766689 is a deficient number, since it is larger than the sum of its proper divisors (1).

100766689 is an equidigital number, since it uses as much as digits as its factorization.

100766689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 100766689 is about 10038.2612538228. The cubic root of 100766689 is about 465.3420830400.

The spelling of 100766689 in words is "one hundred million, seven hundred sixty-six thousand, six hundred eighty-nine".