11928471109 has 2 divisors, whose sum is σ = 11928471110. Its totient is φ = 11928471108.

The previous prime is 11928471103. The next prime is 11928471133. The reversal of 11928471109 is 90117482911.

11928471109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10696110084 + 1232361025 = 103422^2 + 35105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11928471109 - 2²⁹ = 11391600197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11928471103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5964235554 + 5964235555.

It is an arithmetic number, because the mean of its divisors is an integer number (5964235555).

Almost surely, 2^11928471109 is an apocalyptic number.

It is an amenable number.

11928471109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11928471109 is an equidigital number, since it uses as much as digits as its factorization.

11928471109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 43.

The spelling of 11928471109 in words is "eleven billion, nine hundred twenty-eight million, four hundred seventy-one thousand, one hundred nine".