1109955863 has 2 divisors, whose sum is σ = 1109955864. Its totient is φ = 1109955862.

The previous prime is 1109955853. The next prime is 1109955881. The reversal of 1109955863 is 3685599011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1109955863 - 2⁸ = 1109955607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109955853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554977931 + 554977932.

It is an arithmetic number, because the mean of its divisors is an integer number (554977932).

Almost surely, 2^1109955863 is an apocalyptic number.

1109955863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109955863 is an equidigital number, since it uses as much as digits as its factorization.

1109955863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 47.

The square root of 1109955863 is about 33316.0001050546. Note that the first 3 decimals coincide. The cubic root of 1109955863 is about 1035.3850817238.

The spelling of 1109955863 in words is "one billion, one hundred nine million, nine hundred fifty-five thousand, eight hundred sixty-three".