100611209 has 2 divisors, whose sum is σ = 100611210. Its totient is φ = 100611208.

The previous prime is 100611197. The next prime is 100611221. The reversal of 100611209 is 902116001.

It is a balanced prime because it is at equal distance from previous prime (100611197) and next prime (100611221).

It can be written as a sum of positive squares in only one way, i.e., 64850809 + 35760400 = 8053^2 + 5980^2 .

It is an emirp because it is prime and its reverse (902116001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100611209 - 2⁴ = 100611193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100611229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50305604 + 50305605.

It is an arithmetic number, because the mean of its divisors is an integer number (50305605).

Almost surely, 2^100611209 is an apocalyptic number.

It is an amenable number.

100611209 is a deficient number, since it is larger than the sum of its proper divisors (1).

100611209 is an equidigital number, since it uses as much as digits as its factorization.

100611209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 100611209 is about 10030.5138951103. The cubic root of 100611209 is about 465.1026235131.

The spelling of 100611209 in words is "one hundred million, six hundred eleven thousand, two hundred nine".