1105099991 has 2 divisors, whose sum is σ = 1105099992. Its totient is φ = 1105099990.

The previous prime is 1105099969. The next prime is 1105100027. The reversal of 1105099991 is 1999905011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1105099991 - 2¹⁴ = 1105083607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105099591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552549995 + 552549996.

It is an arithmetic number, because the mean of its divisors is an integer number (552549996).

Almost surely, 2^1105099991 is an apocalyptic number.

1105099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105099991 is an equidigital number, since it uses as much as digits as its factorization.

1105099991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32805, while the sum is 44.

The square root of 1105099991 is about 33243.0442498878. The cubic root of 1105099991 is about 1033.8729954488.

The spelling of 1105099991 in words is "one billion, one hundred five million, ninety-nine thousand, nine hundred ninety-one".