1100099209 has 6 divisors (see below), whose sum is σ = 1209200090. Its totient is φ = 1000090080.

The previous prime is 1100099173. The next prime is 1100099219. The reversal of 1100099209 is 9029900011.

It can be written as a sum of positive squares in only one way, i.e., 817960000 + 282139209 = 28600^2 + 16797^2 .

It is not a de Polignac number, because 1100099209 - 2⁷ = 1100099081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100099219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4545744 + ... + 4545985.

Almost surely, 2^1100099209 is an apocalyptic number.

It is an amenable number.

1100099209 is a deficient number, since it is larger than the sum of its proper divisors (109100881).

1100099209 is an equidigital number, since it uses as much as digits as its factorization.

1100099209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091751 (or 9091740 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 1100099209 is about 33167.7435017820. The cubic root of 1100099209 is about 1032.3111483046.

The spelling of 1100099209 in words is "one billion, one hundred million, ninety-nine thousand, two hundred nine".