11108949109 has 2 divisors, whose sum is σ = 11108949110. Its totient is φ = 11108949108.

The previous prime is 11108949031. The next prime is 11108949113. The reversal of 11108949109 is 90194980111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6899794225 + 4209154884 = 83065^2 + 64878^2 .

It is a cyclic number.

It is not a de Polignac number, because 11108949109 - 2¹³ = 11108940917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11108949179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554474554 + 5554474555.

It is an arithmetic number, because the mean of its divisors is an integer number (5554474555).

Almost surely, 2^11108949109 is an apocalyptic number.

It is an amenable number.

11108949109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11108949109 is an equidigital number, since it uses as much as digits as its factorization.

11108949109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 11108949109 in words is "eleven billion, one hundred eight million, nine hundred forty-nine thousand, one hundred nine".