1099999905 has 16 divisors (see below), whose sum is σ = 1767897600. Its totient is φ = 584034048.

The previous prime is 1099999819. The next prime is 1099999907. The reversal of 1099999905 is 5099999901.

It is not a de Polignac number, because 1099999905 - 2⁹ = 1099999393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1099999907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161080 + ... + 167769.

It is an arithmetic number, because the mean of its divisors is an integer number (110493600).

Almost surely, 2^1099999905 is an apocalyptic number.

1099999905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1099999905 is a deficient number, since it is larger than the sum of its proper divisors (667897695).

1099999905 is a wasteful number, since it uses less digits than its factorization.

1099999905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329080.

The product of its (nonzero) digits is 2657205, while the sum is 60.

The square root of 1099999905 is about 33166.2464713751. The cubic root of 1099999905 is about 1032.2800857392.

The spelling of 1099999905 in words is "one billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred five".