109090109 has 2 divisors, whose sum is σ = 109090110. Its totient is φ = 109090108.

The previous prime is 109090099. The next prime is 109090133. The reversal of 109090109 is 901090901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94672900 + 14417209 = 9730^2 + 3797^2 .

It is a cyclic number.

It is not a de Polignac number, because 109090109 - 2⁸ = 109089853 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109090159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54545054 + 54545055.

It is an arithmetic number, because the mean of its divisors is an integer number (54545055).

Almost surely, 2^109090109 is an apocalyptic number.

It is an amenable number.

109090109 is a deficient number, since it is larger than the sum of its proper divisors (1).

109090109 is an equidigital number, since it uses as much as digits as its factorization.

109090109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 109090109 is about 10444.6210558354. The cubic root of 109090109 is about 477.8172141816.

The spelling of 109090109 in words is "one hundred nine million, ninety thousand, one hundred nine".