1108145509 has 2 divisors, whose sum is σ = 1108145510. Its totient is φ = 1108145508.

The previous prime is 1108145501. The next prime is 1108145539. The reversal of 1108145509 is 9055418011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559180609 + 548964900 = 23647^2 + 23430^2 .

It is an emirp because it is prime and its reverse (9055418011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1108145509 - 2³ = 1108145501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1108145501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554072754 + 554072755.

It is an arithmetic number, because the mean of its divisors is an integer number (554072755).

Almost surely, 2^1108145509 is an apocalyptic number.

It is an amenable number.

1108145509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108145509 is an equidigital number, since it uses as much as digits as its factorization.

1108145509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 1108145509 is about 33288.8195795525. The cubic root of 1108145509 is about 1034.8218660813.

The spelling of 1108145509 in words is "one billion, one hundred eight million, one hundred forty-five thousand, five hundred nine".