100999817 has 2 divisors, whose sum is σ = 100999818. Its totient is φ = 100999816.

The previous prime is 100999777. The next prime is 100999849. The reversal of 100999817 is 718999001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85914361 + 15085456 = 9269^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 100999817 - 2¹⁸ = 100737673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100999867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50499908 + 50499909.

It is an arithmetic number, because the mean of its divisors is an integer number (50499909).

Almost surely, 2^100999817 is an apocalyptic number.

It is an amenable number.

100999817 is a deficient number, since it is larger than the sum of its proper divisors (1).

100999817 is an equidigital number, since it uses as much as digits as its factorization.

100999817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 100999817 is about 10049.8665165265. The cubic root of 100999817 is about 465.7006695153.

The spelling of 100999817 in words is "one hundred million, nine hundred ninety-nine thousand, eight hundred seventeen".