109100009 has 2 divisors, whose sum is σ = 109100010. Its totient is φ = 109100008.

The previous prime is 109100003. The next prime is 109100011. The reversal of 109100009 is 900001901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103938025 + 5161984 = 10195^2 + 2272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109100009 is a prime.

Together with 109100011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109100003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54550004 + 54550005.

It is an arithmetic number, because the mean of its divisors is an integer number (54550005).

Almost surely, 2^109100009 is an apocalyptic number.

It is an amenable number.

109100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

109100009 is an equidigital number, since it uses as much as digits as its factorization.

109100009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 109100009 is about 10445.0949732398. The cubic root of 109100009 is about 477.8316678212.

It can be divided in two parts, 10 and 9100009, that added together give a palindrome (9100019).

The spelling of 109100009 in words is "one hundred nine million, one hundred thousand, nine".